Patent Publication Number: US-8526649-B2

Title: Providing notification sounds in a customizable manner

Description:
FIELD OF THE DESCRIBED EMBODIMENTS 
     The described embodiments relate to methods and apparatus for processing and/or enhancing audio signals used by a hearing aid. In particular, a hearing assistance device, such as a hearing aid, can notify an individual having impaired hearing of an external event in a manner of their choosing. 
     DESCRIPTION OF THE RELATED ART 
     A modern hearing aid can help to mitigate at least some of the problems associated with impaired hearing by amplifying ambient sound. A modern hearing aid can receive an input audio signal using an input converter. The audio input signal can in turn be converted into electrical input signals that are routed to a signal processing unit for further processing and amplification. The further processing and amplification can be used to compensate for the individual loss of hearing of a hearing aid wearer. The signal processing unit provides an electrical output signal which is fed via an output converter to the wearer of the hearing aid so the wearer perceives the output signal as an acoustic signal. Earpieces which generate an acoustic output signal are usually used as output converters. 
     Electronic circuitry used by hearing aids varies among devices, even if they are the same style. The circuitry falls into three categories based on the type of audio processing (Analog or Digital) and the type of control circuitry (Adjustable or Programmable). In one category, the audio circuit is analog having electronic components that can be adjusted. With these types of hearing aids, a hearing professional (such as an audiologist or certified technician) determines the gain and other specifications required for the wearer, and then adjusts the analog components either with small controls on the hearing aid itself or by having a laboratory build the hearing aid to meet those specifications. After the adjustment is completed, the resulting audio processing does not change any further, other than possibly overall loudness that the wearer adjusts with a volume control. This type of circuitry is generally the least flexible. 
     In another category, the audio circuit is analog but with additional electronic control circuitry that can be programmed, sometimes with more than one program. The electronic control circuitry can be fixed during manufacturing or in some cases, the hearing professional can use an external computer temporarily connected to the hearing aid to program the additional control circuitry. The wearer can change the program for different listening environments by pressing buttons either on the device itself or on a remote control or in some cases the additional control circuitry operates automatically. This type of circuitry is generally more flexible than simple adjustable controls. 
     In yet another category, both the audio circuit and the additional control circuits are fully digital in nature. The hearing professional programs the hearing aid with an external computer temporarily connected to the device and can adjust all processing characteristics on an individual basis. Fully digital hearing aids can be programmed with multiple programs that can be invoked by the wearer, or that operate automatically and adaptively. These programs reduce acoustic feedback (whistling), reduce background noise, detect and automatically accommodate different listening environments (loud vs. soft, speech vs. music, quiet vs. noisy, etc.), control additional components such as multiple microphones to improve spatial hearing, transpose frequencies (shift high frequencies that a wearer may not hear to lower frequency regions where hearing may be better), and implement many other features. In some embodiments, the hearing aid wearer has almost complete control over the settings of most, but not all, settings. For example, in order to prevent unintended harm to the wearer, certain settings (such as gain) can only be changed within a well-defined range. Other settings, such a frequency response, can have more latitude but any allowed changes will nonetheless be restricted in order to prevent any changes to the audio processing that may be harmful to the hearing aid wearer. 
     Fully digital circuitry can also include wireless hearing aids that allow control over wireless transmission capability for both the audio and the control circuitry. Control signals in a hearing aid on one ear can be sent wirelessly to the control circuitry in the hearing aid on the opposite ear to ensure that the audio in both ears is either matched directly or that the audio contains intentional differences that mimic the differences in normal binaural hearing to preserve spatial hearing ability. Audio signals can be sent wirelessly to and from external devices through a separate module, often a small device worn like a pendant and commonly called a “streamer” that allows wireless connection to yet other external devices. In those embodiments where additional computational resources or sensor resources are required, the external devices can take the form of a portable computing device along the lines of a smart phone, tablet device, and portable media player. 
     Programmable hearing aids that allow a user to adjust the hearing aid response to their own preference have been recently made available at reasonable cost. Using the programmable hearing aid, for example, the frequency response of the hearing aid can be adjusted by the consumer in order to improve the overall user experience by accentuating certain frequencies or range of frequencies. In addition to programmable hearing aids, wireless hearing aids have been developed. For example, for a hearing impaired consumer using two hearing aids, an adjustment to one of the two hearing aids can be transmitted to the other hearing aid such that pressing one hearing aid&#39;s program button simultaneously changes the corresponding settings on the other hearing aid such that both hearing aids change settings simultaneously. 
     Therefore, with the advent of programmable hearing aids and other hearing assistance devices whose signal processing can at least be partially modified, what is desired is providing a hearing aid or hearing assistance device user the ability to modify the audio processing of the programmable hearing aid or hearing assistance device to provide information from the surrounding environment in a subtle and nuanced manner. 
     SUMMARY 
     Broadly speaking, the embodiments disclosed herein describe providing individualized notification to a hearing impaired person. More specifically, in one embodiment, a method performed by a processor for presenting an audible rendering of an event notification signal generated by a notifying device in response to an external event is described. The method is performed by carrying out at least the following operations: receiving the event notification signal at the processing device, processing the event notification signal by the processing device in accordance with a user preference to form the audible rendering of the event notification signal, passing the audible rendering of the event notification signal to an output device, and presenting the audible rendering of the event notification signal by the output device. In one embodiment, the audible rendering of the event notification signal is remapped from the audible rendering of the event notification to a remapped audible rendering based upon a remapping user preference. 
     A system arranged for providing hearing assistance includes at least a computing device. In one embodiment, the computing device is in communication with a hearing assistance device having an output arranged to provide an output suitable for being perceived by a user of the system and a processor that receives an event notification signal provided by a notifying device indicating that an event has occurred. The computing device processes the event notification signal in accordance with an audio processing profile to form an audible rendering of the event notification signal, passes the audible rendering of the event notification signal to the output device, and presents the audible rendering of the event notification signal by the output device. 
     Non-transitory computer readable medium for storing computer code executable by a processor in a hearing assistance device for presenting an audible version of an event notification signal includes at least computer code for receiving the event notification signal at a processing device, processing the event notification signal by the processing device in accordance with a user preference to form the audible rendering of the event notification signal, passing the audible rendering of the event notification signal to an output device, and presenting the audible rendering of the event notification signal by the hearing aid output device. In one embodiment, the audible rendering of the event notification signal is remapped from the audible rendering of the event notification to a remapped audible rendering in accordance with a user remapping preference. 
     A hearing assistance device for presenting an audible version of an event notification generated in response to at least one external event includes at least a processor, a data storage device arranged to store at least a hearing aid profile, an output device, and an interface in communication with the processor for receiving the event notification. In one embodiment, the processor processes the event notification signal to form the audible version of the event notification in accordance with the hearing aid profile, passes the audible version of the event notification signal to the output device, and presents the audible version of the event notification signal by the hearing aid output device. 
     Other aspects and advantages will become apparent from the following detailed description taken in conjunction with the accompanying drawings which illustrate, by way of example, the principles of the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The described embodiments will be readily understood by the following detailed description in conjunction with the accompanying drawings, wherein like reference numerals designate like structural elements, and in which: 
         FIG. 1  depicts representative hearing assistance system  100  in accordance with the presently described embodiments. 
         FIG. 2  illustrates a representative communication system in accordance with the described embodiments. 
         FIG. 3  shows a representative computing device having a data storage device having a plurality of enhancement modules stored therein. 
         FIG. 4  shows an example of remapping in which each member of a group can perceive notification signal provided by a notifying device in a manner chosen by the member. 
         FIG. 5  is a flowchart detailing a process in accordance with the described embodiments. 
         FIG. 6  is a flowchart detailing a process for remapping an audible rendering of an event notification signal in accordance with the described embodiments. 
         FIG. 7  is a block schematic showing another embodiment of a hearing assistance device in the form of a hearing aid. 
         FIG. 8  is a representative computing system in accordance with the described embodiments. 
     
    
    
     DETAILED DESCRIPTION OF THE DESCRIBED EMBODIMENTS 
     In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the concepts underlying the described embodiments. It will be apparent, however, to one skilled in the art that the described embodiments can be practiced without some or all of these specific details. In other instances, well known process steps have not been described in detail in order to avoid unnecessarily obscuring the underlying concepts. 
     In an attempt to compensate for specific hearing loss certain aspects of an audible environment can be augmented in such a way so as to provide additional notification of an event, or events. In some cases, an audible notification of an event associated with a device (a person ringing a doorbell or a telephone ringing) can be enhanced to compensate, at least partially, for an individual&#39;s specific hearing impairment. In one embodiment, the notifying device can be in communication with a computing device (portable or otherwise) that is in turn can be in communication with a hearing aid or other hearing assisting device, such as headphones. In one embodiment, the notifying device can be in direct communication with the hearing aid when the hearing aid includes appropriate built-in computing circuitry. The computing device can receive audible input from the device directly (such as the sound from the doorbell or phone ringer) and process the received sound to compensate for an individual&#39;s particular hearing impairment. 
     In one embodiment, the computing device can receive an indication not necessarily associated with an audible sound from the notifying device that an event has occurred. For example, for someone having little ability to hear any sound, it may not make sense for a smoke alarm to be associated with an audible notification event. In this situation, the smoke alarm can be audibly silent but nonetheless provide an indication that a notifying event (i.e., detection of smoke) has occurred. The indication can take many forms such as a digital data file (such as a .WAV file, MP3 file, and so forth). In one embodiment, the indication can be a code or other indicia that can be used to identify a particular event. The code can be, for example, a data string that can include information specific to the notifying device, type of event, time of event, and so forth. In this way, an event database can be created providing a history of events. In one embodiment, the indication received by the computing device from the notifying device can be used by the computing device to provide a notification of the event occurrence to an individual, or individuals. The notification can take many forms. In those situations where notifications are sent to a number of individuals, each notification can be customized for each individual, a group of individuals, and so on. In this way, the computing device can provide as many types of different notifications as there are individuals being notified. 
     For example, a notification sent to one individual can be vibratory in nature whereas another notification sent to another individual can be visual in nature. In one embodiment, the notification can be simply an audible rendering of a sound associated with the event. For example, the notification can take the form of a doorbell ringing or phone ringing neither of which may be audible to those having impaired hearing and must therefore be processed in such a way to enable those with impaired hearing to perceive the notification and to take action, if necessary. In some cases, the notification can take the form of a sound not usually associated with the event but nonetheless associated with the event by the individual user. For example, a chirping sound can be associated with a doorbell ring instead of the sound generated by a bell or klaxon. 
     However, in addition to merely replicating the sound generated by the doorbell or the phone ringer, the computing device can render the sound the sound in any manner selected by the user. In one embodiment, the rendering can take the form of modifying audio characteristics of the sound to compensate for a specific individual&#39;s hearing impairment. The modification can be based upon information associated with the individual&#39;s specific hearing impairment. The information can be associated with a hearing aid (HA) profile used to configure the audio processing carried out by the individual&#39;s hearing aid. The HA profile can be stored in the hearing aid and/or in the computing device. In any case, the audio processing can be carried out in real time. In one embodiment, the HA profile can include a set of parameters that can represent the context of the environment for which the HA profile is associated. The HA profile can be selected by the individual user to adjust the processing carried out by the audio circuitry on the audible sounds received from the external acoustic environment. In one embodiment, the HA profile can include a range of hearing aid parameters specific to the individual user. The parameters can be established by an audio technician under the guidance of a certified audiologist (or by the audiologist directly). The HA profile can then be programmed into the hearing aid and be used to adjust the processing of external audio by the audio circuitry in the hearing aid. 
     For example, in the case of age related high frequency loss, the computing device can emphasize lower frequencies or ranges of frequencies most likely to be heard by the individual. The notification can be associated with a particular type of stimulation that can be associated with a particular event. For example, a smoke alarm can provide an indication to a smartphone of an occurrence of a smoke event. The smartphone can receive and process the indication of the smoke event to generate a notification customized for the current possessor of the smartphone. In one embodiment, the notification can be visual in nature in that the smartphone can flash brightly on an off and/or vibrate in order to get the attention of the user. In one embodiment, the smartphone can wirelessly send a notification to an individual&#39;s hearing aid (either directly or to a processing unit in communication with the hearing aid) or hearing assisting device. In this way, the notification can be processed to generate an audible notification that can be passed by way of the hearing aid directly to the auditory system of the user. 
     These and other embodiments are discussed below with reference to  FIGS. 1-8 . However, those skilled in the art will readily appreciate that the detailed description given herein with respect to these figures is for explanatory purposes as the invention extends beyond these limited embodiments. 
       FIG. 1  depicts representative hearing assistance system  100  in accordance with the presently described embodiments. Hearing assistance system  100  can include aural presentation device  102  and external device  104 . In a particularly useful configuration, aural presentation device  102  can take the form of hearing aid  102  and external device  104  can take the form of a computing device  104  such as a smartphone (such as an iPhone™) or portable media player (such as an iPod™) each manufactured by Apple Inc. of Cupertino, Calif. In one embodiment, hearing aid  102  can be arranged to aurally present a notification message from within an auditory canal of a user. In addition, hearing aid  102  can be arranged to provide hearing aid functionality. Hearing aid  102  can be configured for placement at least partially within the auditory canal and includes housing  106 . In one embodiment, housing  106  can be configured for placement entirely within the auditory canal of the user. In accordance with this embodiment, notification messages can be presented in the auditory canal by way of output device  108  positioned within the housing, e.g., through one or more openings (represented by opening  110 ) in housing  106 . In one embodiment, housing  106  can be configured for placement external to the auditory canal, e.g., in an exterior portion of the ear such as between the auricle of the ear and the head of the user. 
     Receiver  112  positioned within housing  106  can be configured to receive signals, e.g., from computing device  104 . Transmitter  114  configured to transmit communication signals, e.g., to computing device  104 , can be further positioned within housing  106 . Receiver  112  and transmitter  114  can be independent or combined as a transceiver. Receiver  112  may be a data interface. Receiver  112  and/or transmitter  114  can communicate via a wired communication port  115  or wireless connection, e.g., using an infra-red (IR) LED or a radio frequency (RF) connection through an antenna  116 . In one embodiment, computing device  104  and hearing aid  102  can be a single unit in which case wired communication port  115  (or other appropriate wired connection) can be used to pass information between computing device  104  and hearing aid  102 . 
     Processor  118  can be coupled to receiver  112  and transmitter  114  (if present). In addition, processor  118  can be coupled to output device  108  (e.g., via an amplifier  120 ), memory  122 , optional counter  124 , and optional clock  126 . Processor  118  can be configured to receive data via receiver  112 , transmit data via the transmitter  114  (if present), store and retrieve data from the memory  122 , and interact with the counter  124  and/or clock  126  (if present). In addition, processor  118  can be configured to process data from receiver  112 , memory  122 , counter  124 , and/or clock  126  and is further configured to drive output device  108  (e.g., via amplifier  120 ) to aurally present predefined notification messages based on the processed data. Processor  118  can be further be configured to convert compressed audio signals into signals suitable for aural presentation. The audio signals can be compressed to reduce transmission bandwidth and/or to maximize use of the memory  122 . An input device  128  such as a button may further be coupled to processor  118  and positioned on housing  106  to receive feedback from a user. A suitable processor for use with the present invention will be understood by one of skill in the art. 
     Hearing aid  102  can include components to provide hearing aid functionality. In the illustrated hearing aid  102 , microphone  130  converts sound signals into electrical signals, amplifier  132  increases the amplitude of the electrical signals, and output device  108  changes the amplified electrical signal back into a form that can be used to convey audible information to the hearing air user. For example, when output device  108  is a speaker, speaker  108  can provide sound energy that is directed into the auditory canal of the user. It should be noted that output  108  can take many forms depending upon the nature of hearing aid  102 . For example, in one embodiment, output  108  can take the form of an acoustic transducer arranged to provide acoustic output in the form of sound waves. The acoustic output can then be transmitted in a conventional manner to the hearing aid user&#39;s auditory system. In one embodiment, output  108  can be used to stimulate nerves in the hearing aid user&#39;s auditory system. In one embodiment, output  108  can be implanted into a bone near the hearing aid user&#39;s auditory system. In this way, electrical energy generated by output  108  can be transmitted through the bone and be used to stimulate certain auditory nerves. This type of hearing aid is generally described in terms of a cochlear implant. 
     Suitable microphones, amplifiers, and speakers/hearing aid receivers will be understood by one of skill in the art. The audio processing performed by the audio circuitry in a hearing aid can be based upon a number of hearing aid parameters that can be changed by adjusting controls or by programming. Such hearing aid parameters can include frequency response (e.g., signal edge displacement, rise time in the low and high tone range), gain, starting point of AGC, peak clipping, and so forth. For optimal performance, a particular audio environment can have associated with it a particular range of hearing aid parameters that can be further adjusted for the individual user. However, in order to properly adjust the audio processing of the audio circuitry, a potentially large number of hearing aid controls must be adjusted on a real time basis. Since the user can only freely adjust relatively few parameters such as volume or gain, one of the described embodiments utilizes a hearing aid parameter profile, or more simply, HA profile. 
     Computing device  104  can include transmitter  134  configured for transmitting signals to receiver  112  of hearing aid  102 . Computing device  104  can further include receiver  136  configured for receiving signals from the transmitter  114  of hearing aid  102 . Transmitter  134  and receiver  136  can be independent or combined as a transceiver. Transmitter  134  and/or the receiver  136  can communicate via wired communication port  138  or wireless connection, e.g., through antenna  140 . Signals transmitted between the computing device  104  and hearing aid  102  can include data identifying the source and/or desired destination of the transmitted signals. This enables the use of one or more external devices (represented by computing device  104 ) with one or more aural presentation devices (represented by hearing aid  102 ) in the same vicinity. For example, a single external device may be used with a single aural presentation device, a single external device may be used with a plurality of aural presentation devices, a plurality of external devices may be used with a single aural presentation device, and a plurality of external devices may be used with a plurality of aural presentation devices. 
     In one embodiment, a string of data may be included with each transmission from a first external device to a first aural presentation device that identifies both the first external device and the first aural presentation device. When the message is received at the first aural presentation device, the first aural presentation device checks the string of data and processes the transmission if the string of data indicates that the first aural presentation device is the intended recipient. Likewise, an acknowledgement from the first aural presentation device to the first external device may include a similar string of data. When the acknowledgment is received at the first external device, the first external device checks the string of data and processes the transmission if the string of data indicates that the first external device is the intended recipient of the acknowledgment. 
     Computing device  104  can be configured to receive data via one or more input devices (represented by input device  142 ). One or more of the input devices may be incorporated into the computing device  104 . The input devices may include a button, switch, keyboard, touch pad, touch screen, mouse, microphone, or essentially any device capable of generating a signal conveying information. Input device  142  can also include sensors arranged to receive both sound energy (microphone) and light energy (photometer). In this way, computing device  104  can receive information directly from the external environment in the form of sound and/or light. The input device  142  may be used to enter information and to receive feedback from a user with the aural presentation device positioned within their auditory canal. The computing device  104  may optionally be configured to receive and/or transmit communication signals via communication system  144 , such as a telephone system or the Internet. Communication system  144  can enable an interested party, e.g., a relative, friend, or care provider, to initiate a notification message (sending email, calling on the phone, and so forth) and/or receive feedback from the hearing assistance system  100 . For example, an interested party could contact the computing device  104  via communication system  144  using a cell phone, personal digital assistant (PDA), or essentially any communication device and remotely cause a message to be aurally presented, e.g., by entering a number corresponding to a particular predefined notification message. Additionally, the communication system may receive audio and/or text notification messages. In embodiments where text notification messages are received, the computing device  104  may include a text to speech converter (not shown) to convert the text message to an aural notification message. 
     Processor  146  within the computing device  104  can be coupled to transmitter  134  and to the receiver  136  (if present). Processor  146  can be further coupled to memory  148 , the input device  142 , optional counter  150 , optional clock  152 , and communication system  144 . Processor  146  can be configured to transmit data via the transmitter  134 , receive data via the receiver  136  (if present), receive data via the input device  142 , store and retrieve data from the memory  148 , and interact with the counter  150  and/or clock  152  (if present). The transmitted and received data may include the data described above for identifying particular external devices and aural presentation devices. In addition, processor  146  can be configured to process data from communication system  144 , input device  142 , memory  148 , and counter  150  and/or clock  152  (if present), and is further configured to transmit data responsive to the processed data via transmitter  134 . A suitable processor for use with the present invention will be understood by one of skill in the art. 
     In one embodiment shown in  FIG. 2 , communication system  144  can include wireless notifying devices  200  and wired communication devices  250 . Wireless notifying devices  200  can include at least doorbell  202 , telephone  204 , smoke alarm  206 , and microphone  208 . In one embodiment, each of the wireless notifying devices  200  can generate a particular audio or notification signal each of which can be received and processed by computing device  104 . Wired devices  250  can include audio equipment  252 , microphone  254 , a conventional wired telephone (sometimes referred to as a landline)  256  and so forth. In this regard, wired input  138  can take the form of a plurality of wired inputs, namely a stereo input jack, as well as an on-board microphone array including left, center and right microphone inputs, and so on. In one embodiment, receiver  136  (as well as receiver  112 ) can include a T-coil sensor (not shown) for receiving signals from conventional telephones and American&#39;s with Disabilities Act (ADA) mandated T-coil loops in public buildings, or other facilities, which utilize T-coil loops to assist the hearing impaired. Accordingly, in the case of the conventional telephone have the T-coil loops, an incoming telephone call is intercepted and a signal is wirelessly sent to computing device  104  to alert the user that there is an incoming call, and if accepted, to transmit the audio signal from telephone  256  directly to computing device  104  for processing and subsequent transmission to hearing aid  102 . 
     Receiver  136  can receive incoming wireless notification signals from wireless notifying devices  200  by way of antenna  140 . Moreover, processor  146  can multiplex and de-multiplex the multiple incoming signals, distinguishing one signal from the others, as well as processing the signals separately from the other incoming signals. In one embodiment, computing device  104  can be programmed or otherwise configured to recognize each connected notifying device. In one embodiment, computing device  104  can present information identifying each of the notifying devices in communication therewith. In one embodiment, the information can be presented graphically on a display. In one embodiment, the information can be presented audibly at either computing device  104  or by hearing aid  102 . In one embodiment, recognition and identification of each of wireless notifying devices  200  can be accomplished by a pairing function (similar to known Bluetooth®) where each wireless notifying device transmits identification information to computing device  104 . For example, computing device  104  can recognize each notifying device and present information to the user that can be used to identify the source of the signal. In those cases where computing device  104  includes a display, a text message such as “SMOKE ALARM” or “FIRE” can be presented visually. In other contexts, an audiblized rendition corresponding to “SMOKE ALARM” or “FIRE” can be provided to hearing aid  102  for audible presentation to the user by output device  108 . 
     Any of devices  200  and  250  can generate a notification signal that can be forwarded in real time to computing device  104 . In one embodiment, the notification signal can take the form of an audible sound (such as a bell sound associated with a door bell) that can be intercepted and processed by computing device  104 . In some cases, the audible sound can be processed by processor  146  in accordance with a set of user specific processing instructions. The user specific processing instructions can be based upon, for example, a hearing aid (HA) profile stored in or otherwise associated with hearing aid  102 . In this situation, the audio processing of the audible notification can be in accordance with the specific hearing impairment of the user. For example, if the user has high frequency deficit based upon age or injury, then the audio processing performed by computing device  104  can enhance the audible notification such that those frequencies for which the user is more sensitive can be emphasized. 
     In one embodiment, the audible notification signal can be re-mapped such that the original audible notification signal can be perceived by the user as a sound that the user has chosen to represent the audible notification. For example, when doorbell  202  is activated, doorbell  202  can issue an audible notification signal having a sound corresponding to a bell, buzzer, klaxon, and so forth. The audible notification can, in turn, be received by computing device  104  at input device  142  (in the form of a microphone). Computing device  104  can process the audible notification in such a way that the user perceives not a bell ringing, a buzzer buzzing or a klaxon blaring, but rather a bird chirping, a voice intoning “someone is at the door”, or a well-known show tune, and so forth. 
     In one embodiment, the notification signal can include information that a notification event has occurred (i.e., the doorbell is buzzing, the phone is ringing, etc.). The information can be related to the notifying device, the time of day, the processing to be performed (if any), and so forth. In one embodiment, the information can be expressed in terms of a string of characters. The string of characters can be arranged to form, for example, a data word that can be used by computing device  104  to process the information. For example, smoke alarm  206  can detect smoke and issue indication  210 . Information  210  can take the form of character string  212 . Character string  212  can include a number of characters some of which, taken singly or in combination, can present information that can be used by processor  146 . Processor  146  can use the information to identify the source of the notification, a time of notification, a type of notification, and a re-mapping preference for providing an input (audio or otherwise) from hearing aid  102 . It should be noted that the re-mapping can take many forms. For example, the re-mapping of notification signal  210  can result in the user perceiving a sound, a tactile sensation, a visual presentation, and so on each of which can be specifically selected to be associated with a particular notifying device, time of day, and so on. 
     In one embodiment, the user can customize processing of each incoming notification according to the particulars of the user&#39;s hearing impairment and/or hearing preferences. Accordingly, for each incoming notification, a specific enhancement process can be applied with the aim of improving the sound quality and/or perception of each of different notification sources. In one embodiment, as shown in  FIG. 3 , a number of enhancement modules  300  can be stored in memory  148  for selective application to an incoming notification source. For example, the user may have several different enhancement modules that have been developed for different environmental conditions, i.e. volume control  302 , multi-band equalization  304 , balance  306 , multiple sound source mixing  308 , multiple microphone beam forming  310 , echo reduction  312 , error correction  314 , etc. In one embodiment, appropriate different enhancement modules can be applied to different incoming notifications and resulting audio streams. In one embodiment, more than one enhancement module can be selected such that the selected enhancement modules can be applied in series (i.e., one after the other). 
     It should be noted, however, that in some cases, the order of application of the enhancements modules may make a significant difference to the overall sound quality. The user thus has the ability to experiment with different enhancements and the order of application of enhancement modules. In one embodiment, the ordering of the application of the enhancement modules can be performed manually by the user in real time. In one embodiment, the ordering can be based upon a hearing aid (HA) profile. As a result, each individual hearing aid user can select combinations of enhancements that work well for their particular hearing deficit. The user thus has the ability to self-test and self-adjust the hearing system and customize the system for their particular needs. 
       FIG. 4  shows an example of remapping in which each member of group  400  can perceive notification signal  402  provided by notifying device  404  in a manner chosen by the member. Presuming for this example only that notifying device  404  is a door bell that generates notification signal  402  indicating that someone is at the front door. In one embodiment, notification signal  402  can be audible in that notifying device  404  (i.e., doorbell) generates an audible sound along the lines of a buzzer, bell, klaxon, and so forth. In one embodiment, notification signal  402  can take the form of data such as a character string. In this case, notifying device  404  can itself be silent or can also provide an audible sound. In any case, notification signal  402  can be received by personal computing devices  410 - 1  through  410 - 4  in possession of members  406 - 1  through  406 - 4 , respectively, of group  400 . In some cases, however, a member (such as  406 - 1 ) can be in possession of hearing assistance device  408 - 1  having computing resources sufficient to handle all necessary processing of notification signal  402 . In these cases, a member in possession of such a hearing assistance device does not require a personal computing device to process notification signal  402 . 
     In any case, each of the members  406  of group  400  can choose to perceive notification signal  402  in any manner desired. For example, member  406 - 2  can choose to perceive notification signal  402  as a bird chirping (i.e., “chirp”), whereas member  406 - 1  can choose to perceive notification  402  as a show tune, member  406 - 4  as a voice intoning, “someone is at the door”, and  406 - 3  as a horn honking. In order to perceive notification signal  402  in an individually selected manner, portable computing device  410  can be used to receive and process notification signal  402  (save for those situations as with member  406 - 1  in possession of hearing assistance device  408 - 1  that receives and processes notification signal  402  directly). 
     Once received, notification signal  402  can be processed in accordance with a particular enhancement module (s)  300 . For example, portable computing device  410 - 2  can receive notification signal  402 . Portable computing device  410 - 2  can then identify the source of notification signal  402 . In one embodiment, the identification can be based upon location information or source identification included in or otherwise associated with notification signal  402 . Once the source of notification signal  402  is identified, portable computing device  410 - 2  can retrieve an appropriate enhancement module(s) from storage device  148 . In this particular case, the appropriate enhancement module can be one associated with a bird chirping, bird song, and so on. Portable computing device  410 - 2  can then process notification signal  402  in accordance with the retrieved enhancement module. The processed notification signal can then be passed directly to hearing assistance device  408 - 2  which then provides an output signal (audible sound, vibrations, electrical stimulus, etc.) perceivable to member  406 - 2 . In one embodiment, personal computing device  408  can take the form of a smartphone such as an iPhone™ or personal media player such as an iPod™. 
       FIG. 5  shows a flowchart detailing process  500  in accordance with the described embodiments. Process  500  can be carried out by a hearing assistance system. In one embodiment, the hearing assistance system can include a computing device in communication with a hearing assistance device. In one embodiment, the hearing assistance system can include only the hearing assistance device or only the computing device. In this way, all processing can be performed within either the hearing assistance device or the computing device. In any case, process  500  can be carried out by performing at least the following operations. At  502 , an event notification signal generated by a notifying device in response to an external event is received at a processing device in communication with the hearing assistance device. In one embodiment, the hearing assistance device can take the form of a hearing aid that can, for example, be placed within an auditory channel of a hearing impaired individual. In one embodiment, the hearing assistance device can take the form of ear buds that while placed in proximity to the user&#39;s ear channel, they are typically not designed to be placed within the user auditory channel. In one embodiment the hearing assistance device can take the form of an over the ear device such as head phones. 
     The event notification signal can be associated with a first audible signal generated by a notifying device such as a doorbell, telephone, microwave oven timer and so on. At  504 , the first audible signal is processed by the processing device to form an audible rendering corresponding to the event notification signal. In one embodiment, the processing of the event notification signal can be re-mapped from the first audible sound to a second audible sound based upon a remapping protocol. For example, activation of a doorbell mechanism (event) can be associated with a notification signal corresponding to a first audible sound of a bell ringing. However, in some cases, the notification signal can be remapped from the first audible sound to a second audible sound (e.g., bird chirping) that is then associated with the event. In this way, when the doorbell mechanism is activated, the user will perceive a sound of a bird chirping and not a bell ringing. In one embodiment, the processing of the event notification signal can be carried out in accordance with user specific parameters that can be used to improve aspects of the user&#39;s hearing impairment (such as age related high frequency hearing loss). The user specific parameters can be included in or otherwise associated with a hearing aid profile specific to the user. 
     At  506 , the processed notification signal in the form of the first audible signal is passed to the hearing assistance device. In one embodiment, the first audible signal can be wirelessly passed to the hearing assistance device in real time. It should be noted that in those cases where the hearing assistance system includes the hearing assistance device that performs the processing, then clearly there is no need to pass the processed notification. In any case, at  508 , the hearing assistance device outputs the first audible signal in such a way so as to be perceived by the user. In one embodiment, the first audible signal can be output in the form of electrical signals that can be used to stimulate auditory nerves. In other embodiments, the first audible signal can cause an output device in the form of an acoustic transducer to output audible sound energy. 
       FIG. 6  shows a flowchart detailing process  600  for remapping the association between an event notification signal and a first audible rendering of the event notification signal in accordance with the described embodiments. Process  600  can begin at  602  by receiving a remapping preference. In one embodiment, the remapping preference can be obtained from a user preference file. For example, an event corresponding to activating a doorbell mechanism can be associated with an audible notification of a bell ringing. However, when remapped using the remapping preference, the event to be associated with a remapped audible notification corresponding to a bird chirping. At  604 , the second audible rendering of the event notification is formed in accordance with the remapping preference. Again using the example of the doorbell, the sound of the bell ringing can be re-mapped to a text message, “someone is at the door”. At  606 , the second audible rendering is passed to an output device where the second audible rendering of the event notification signal is presented at  608 . 
       FIG. 7  is a block schematic showing another embodiment of hearing aid  102  in the form of hearing aid  700 . Hearing aid  700  can include at least audio sensor  702  arranged to detect acoustic energy that can take the form of sound. In one embodiment, audio sensor  702  can take the form of (one or more) microphone  702  connected to an input node of audio processing circuitry  704 . Microphone  702  can use, for example, a vibrating membrane that can mechanically respond to sound waves impinging on its surface. The vibrating membrane can interact with a transducer (not shown) to create electrical signal  706  that is analogous (i.e., analog) to the detected sound waves. 
     Analog signal  706  can be passed to audio processing circuitry  704  for processing. It should be noted that audio processing circuitry  604  can be totally analog in nature, whereas in other embodiments, audio processing circuitry  704  can have some components that are analog while other components are digital. However for the remainder of this discussion and without loss of generality, audio processing circuitry  704  will be considered as being fully digital in nature. Therefore, digital audio processing circuitry  704  can include analog to digital (A/D) converter unit  708  arranged to receive analog signal  706  generated by microphone  702 . A/D converter unit  708  converts analog signal  706  into digital signal  710  using any suitable digitization process. For example, A/D converter unit  708  can periodically sample analog signal  706 , the sampled value of analog signal  706  being used to form digital signal  710 . 
     In one embodiment, an output node of A/D converter unit  708  can be connected to (digital) signal processor  712 . DSP  712  can include at least additional signal processing circuits (not shown) for filtering, compressing and amplifying input digital signal  710  to form output digital signal  714  at an output node of DSP  712  that can, in turn, be connected to an input node of a digital/analog (D/A) converter  716 . D/A converter  716  can convert digital signal  714  into a corresponding analog signal  718  at an output node of D/A converter  716  that can be connected to and be used to drive output transducer  720 . It should be noted, however, that in an alternative embodiment, DSP  612  can be configured in such a way to drive output transducer  720  directly without requiring D/A converter  716 . 
     In one embodiment, DSP  712  can be programmable by which it is meant that the audio processing carried out by DSP  712  can be widely varied. For example, DSP  712  can be programmed according to a hearing aid profile that can include a plurality of settings each of which can alter a corresponding audio processing operation. For example, the settings can include various frequency response curves (along the lines of an equalizer), gain control, filtering such as notch or band pass filtering and the like. In this way, hearing aid  700  can adapt its signal processing to a wide number of variables such as the environmental (i.e., ambient) noise level, room acoustic characteristics, user provided changes to parameters and so on. 
     In one embodiment, a hearing aid profile can include a set of rules relating to speech intelligibility implemented in DSP  712  that can be used to optimize the signal processing by, for example, reducing or even merely characterizing ambient noise based on an analysis carried out by DSP  712 . In one embodiment the signal processing can be used to improve overall signal reproduction to benefit intelligibility of speech in the reproduced audio signal. These rules are preferably based on the theory of the speech intelligibility index, but may be adapted to other beneficial parameters relating to audio reproduction in alternative embodiments. 
     Furthermore, in an alternative embodiment, parameters other than the individual frequency band gain values can be incorporated as output control parameters. These values can, for example, be attack or release times for gain adjustments, compression ratio, noise reduction parameters, microphone directivity, listening program, frequency shaping, and other parameters. Alternative embodiments that incorporate several of these parameters can easily be implemented, and the selection of which parameters will be affected by the analysis may be applied by the hearing aid provider at the time of fitting the hearing aid to the individual user, or subsequent to the fitting, using any number of techniques described herein. 
       FIG. 8  is a block diagram of an electronic device  800  suitable for use with the described embodiments. The electronic device  800  illustrates circuitry of a representative computing device. The electronic device  800  includes a processor  802  that pertains to a microprocessor or controller for controlling the overall operation of the electronic device  800 . The electronic device  800  stores media data pertaining to media items in a file system  804  and a cache  806 . The file system  804  is, typically, a storage disk or a plurality of disks. The file system  804  typically provides high capacity storage capability for the electronic device  800 . However, since the access time to the file system  804  is relatively slow, the electronic device  800  can also include a cache  806 . The cache  806  is, for example, Random-Access Memory (RAM) provided by semiconductor memory. The relative access time to the cache  806  is substantially shorter than for the file system  804 . However, the cache  806  does not have the large storage capacity of the file system  804 . Further, the file system  804 , when active, consumes more power than does the cache  806 . The power consumption is often a concern when the electronic device  800  is a portable media device that is powered by a battery  807 . The electronic device  800  can also include a RAM  809  and a Read-Only Memory (ROM)  811 . The ROM  811  can store programs, utilities or processes to be executed in a non-volatile manner. The RAM  809  provides volatile data storage, such as for the cache  806 . 
     The electronic device  800  also includes a user input device  808  that allows a user of the electronic device  800  to interact with the electronic device  800 . For example, the user input device  808  can take a variety of forms, such as a button, keypad, dial, touch screen, audio input interface, visual/image capture input interface, input in the form of sensor data, etc. Still further, the electronic device  800  includes a display  813  (screen display) that can be controlled by the processor  802  to display information to the user. A data bus  815  can facilitate data transfer between at least the file system  804 , the cache  806 , the processor  802 , and the CODEC  817 . 
     In one embodiment, the electronic device  800  serves to store a plurality of media items (e.g., songs, podcasts, etc.) in the file system  804 . In one embodiment, file system  804  can include non-transitory computer readable medium for storing computer code executable by processor  802 . When a user desires to have the electronic device play a particular media item, a list of available media items is displayed on the display  813 . Then, using the user input device  808 , a user can select one of the available media items. The processor  802 , upon receiving a selection of a particular media item, supplies the media data (e.g., audio file) for the particular media item to a coder/decoder (CODEC)  817 . The CODEC  817  then produces analog output signals for a speaker  819 . The speaker  819  can be a speaker internal to the electronic device  800  or external to the electronic device  800 . For example, headphones or earphones that connect to the electronic device  800  would be considered an external speaker. 
     The electronic device  800  also includes a network/bus interface  821  that couples to a data link  823 . The data link  823  allows the electronic device  800  to couple to a host computer or to accessory devices. The accessory devices can include ear buds, head phones, a hearing aid and such. The data link  823  can be provided over a wired connection or a wireless connection. In the case of a wireless connection, the network/bus interface  821  can include a wireless transceiver. The media items (media assets) can pertain to one or more different types of media content. In one embodiment, the media items are audio tracks (e.g., songs, audio books, and podcasts). In another embodiment, the media items are images (e.g., photos). However, in other embodiments, the media items can be any combination of audio, graphical or visual content. 
     The various aspects, embodiments, implementations or features of the described embodiments can be used separately or in any combination. Various aspects of the described embodiments can be implemented by software, hardware or a combination of hardware and software. The computer readable medium is any data storage device that can store data which can thereafter be read by a computer system. Examples of the computer readable medium include read-only memory, random-access memory, CD-ROMs, DVDs, magnetic tape, and optical data storage devices. The computer readable medium can also be distributed over network-coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. 
     The many features and advantages of the present invention are apparent from the written description and, thus, it is intended by the appended claims to cover all such features and advantages of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, the invention should not be limited to the exact construction and operation as illustrated and described. Hence, all suitable modifications and equivalents may be resorted to as falling within the scope of the invention.