# Patent

## Title
Voice transmission apparatus with UWB

## Abstract

A voice communication device such as an earpiece that provides for ultra short range transmission of voice sound information using ultra wide band (UWB) radio communications is disclosed. According to one embodiment of the present invention, a voice communication device includes a speaker, a bone conduction sensor for sensing voice sound vibrations, and an UWB transceiver operatively connected to the speaker and the bone conduction sensor. According to another embodiment of the present invention, a voice communication device is disclosed that includes an earpiece housing, a speaker operatively connected to the earpiece housing for transducing audio, an air conduction sensor operatively connected to the housing for sensing voice sound information, a processor electrically connected to the speaker and the bone conduction sensor and disposed within the earpiece housing, and an UWB transceiver operatively connected to the processor.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a divisional of Ser. No. 10/235,770 filed Sep. 5, 2002, now U.S. Pat. No. 6,952,483, which is continuation-in-part of U.S. Ser. No. 10/134,239, filed Apr. 29, 2002 which is a continuation of U.S. Ser. No. 09/587,743 filed on Jun. 5, 2000 which issued as U.S. Pat. No. 6,408,081, which is a continuation of U.S. Ser. No. 09/309,107 filed on May 10, 1999 which issued as U.S. Pat. No. 6,094,492. U.S. Ser. No. 10/235,770 is also a continuation-in-part of U.S. Ser. No. 09/607,305 filed Jun. 30, 2000, now U.S. Pat. No. 6,823,195, and a continuation-in-part of U.S. Ser. No. 09/707,515 filed Nov. 7, 2000, now U.S. Pat. No. 6,738,485.


BACKGROUND OF THE INVENTION
The present invention relates to a voice communication device using ultra wide band (UWB) technology. More particularly, but not exclusively, the present invention relates to the use of UWB in a two-way communications earpiece.
There has been great interest in providing improved handsfree earpieces. Various problems have arisen in different contexts regarding such earpieces. For example, one context where an improved handsfree earpiece is desired is for use in conjunction with cellular telephones. Using a handsfree earpiece not only frees the user's hands, but also allows the cellular telephone to be used without pressing the cellular telephone against the side of the head. The electromagnetic radiation of a cellular telephone is thought to be associated with certain health risks that can be reduced by moving the cellular telephone away from the head region and using an earpiece instead.
Other problems regarding cellular phones relate to the quality of the voice sound information. These same problems are also prevalent in voice recognition applications as described in U.S. Pat. No. 6,094,492, herein incorporated by reference in its entirety.
Therefore, it is a primary object, feature or advantage of the present invention to improve upon the state of the art.
It is a further object, feature, or advantage of the present invention to provide a wireless voice communication device that reduces electromagnetic radiation.
Another object, feature, or advantage of the present invention is to provide a voice communication device that provides for improved sensing of voice sound information.
Yet another object, feature, or advantage of the present invention is to provide a voice communication device that requires very low power.
These and/or other objects, features or advantages of the present invention will become apparent from the specification and claims.
SUMMARY OF THE INVENTION
The present invention relates to a voice communication device, such as an earpiece, that provides for ultra short range transmission of voice sound information using ultra wide band (UWB) radio communications. In one embodiment of the present invention, the voice sound information is sensed with a bone conduction sensor, although the present invention also provides for sensing with an air conduction sensor, as well as a plurality of sensors that can includes one or more air conduction sensors and one or more bone conduction sensors. The use of UWB allows for reductions in transmit power required and for greater bandwidth applications.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a pictorial representation of a user wearing a voice communication device according to one embodiment of the present invention.
FIG. 2 is a diagrammatic representation of an earpiece according to one embodiment of the present invention placed within the ear of a user.
FIG. 3 is a block diagram of one embodiment of the present invention.
FIG. 4 is a block diagram of one embodiment of a system of the present invention.



DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT
The present invention provides a two-way voice communication earpiece using ultra wide band (UWB) technology. FIG. 1 provides a pictorial representation of a user 10 equipped with an earpiece 12 according to one embodiment of the present invention. The earpiece 12 is in wireless communication with an electronic device 16, such as a cellular telephone, personal digital assistant (PDA) or other electronic device.
In FIG. 2, the earpiece 12 is shown as worn on the ear 20 of the user. The embodiment shown includes an earpiece housing 18 that includes a behind-the-ear portion 22 as well as an in-the-ear portion 24. The present invention, however, contemplates that earpiece housing 18 can take on various forms such as may be appropriate for a particular commercial embodiment. For example, the earpiece can alternatively be a complete in-the-canal earpiece.
The earpiece 12 includes a bone conduction sensor 26. Preferably, the bone conduction sensor 26 is fitted to the posterior superior wall 28 of the external auditory canal 30 of the user. This places the bone conduction sensor 26 against the mastoid region such that the bone conduction sensor 26 can sense vibrations associated with talking or other voice sound information. The present invention, however, contemplates that the bone conduction sensor can be placed elsewhere. Use of the bone conduction sensor 26 is preferred as it allows purer voice sound information to be sensed without being adulterated by ambient noises. The present invention contemplates that the bone conduction sensor 26 can be otherwise placed, but that which is shown is preferred. The bone conduction sensor is preferably small and light weight and low in power consumption. The bone conduction sensor can be an accelerometer such as is available from Endevco, or other vibratory sensing sensor.
The earpiece 12 also includes an air conduction sensor 32 such as a microphone or microphone element. The air conduction sensor 32 is also preferably placed within the external auditory canal 30 such that the sounds sensed more closely correspond with the sounds that the user hears. Note that the earpiece 12 is preferably nonocclusive in nature such that the earpiece 12 does not block the external auditory canal 30 of the user. This renders the earpiece 12 more comfortable for a user to wear and allows the user to continue to hear ambient sounds when using the earpiece 12.
A speaker 34 is also shown. The speaker is also preferably placed within the external auditory canal of the user. When placed in this manner, the volume of sound emitted from the speaker need not be as high as if the speaker was placed further away from the middle ear thus reducing power consumption. The present invention, however, contemplates that the speaker can otherwise be placed such as may be convenient or desired in a particular design or application.
FIG. 3 illustrates a block diagram according to one embodiment of the present invention. In FIG. 3 the earpiece 12 is shown including an intelligent control such as, but not limited to, a processor 40. The processor includes an analog to digital converter 42 and digital to analog converter 44 and preferably is adapted to perform speech processing. The processor 40 is also electrically connected to a UWB transceiver 46. The UWB transceiver is used to transmit and receive wireless communications. Examples of UWB transceivers include those available from Time Domain Corporation or Xtreme Spectrum. The UWB transceivers use ultra short duration pulses to result in low power spectral densities and improved immunity to interference from other radio signals. For ultra short range communications, preferably the UWB transceiver of the present invention has a transmission power of less than 100 mW, and preferably even lower such as less than 100 uW. In addition, the UWB transceivers provide more than sufficient bandwidth for two-way voice communications.
The present invention contemplates that both a bone conduction sensor and an air conduction sensor need not be used. In addition, multiple bone conduction sensors or multiple air conduction sensors can be used. Alternatively one or more bone conduction sensors and one or more air conduction sensors can be used. Where multiple sensors are used, processing can take place within the earpiece 12 and its associated earpiece housing 18 and/or remotely. The UWB transceiver of the present invention preferably provides sufficient bandwidth to transmit streams from multiple sensors simultaneously such that processing can also take place remotely.
The present invention further provides that the earpiece 12, in addition to providing voice communications, can be used in the context of other applications where an identifier is associated with the earpiece 12. One such application is shown in a diagram of FIG. 4. In FIG. 4, an earpiece 12A and an earpiece 12B according to the present invention are shown. Each earpiece 12 can communicate with other earpieces or with one or more local units 50A, 50B, and 50C. Due to the short range of the UWB transceiver in the earpiece 12A or 12B, the location of each earpiece 12A or 12B can be determined based on which of the one or more local units 50A, 50B, and/or 50C and which other earpieces are in communication with the particular earpiece. The present invention contemplates that each local unit 50A, 50B and/or 50C is operatively connected to a network 52. Each local unit includes a UWB transceiver for communicating with the earpieces or other UWB devices. Communications can be sent over the network to one or more local units and then from the one or more local units to a particular earpiece. Likewise, communications from one or more earpieces can be sent through one or more local units to a network 52. As each earpiece has an identifier which is transmitted in association with any voice communications, other earpieces and/or local units can receive the identifier and can then forward on messages based on the identifier. The identifier of each earpiece can be used for identifying the sender or recipient of a particular voice communication.
Thus, the present invention provides for associating an identifier, which could be an Internet Protocol (IP) address or other identifier, with each earpiece 12 so that messages or other communications to and from the earpiece 12 can be routed through other earpieces, through local units, or otherwise.

## Claims

1. A voice communication system comprising:
a UWB earpiece comprising a speaker, a sensor, and a UWB transceiver operatively connected to the speaker and the sensor;
a phone adapted for operative communication with the UWB earpiece wherein the phone includes a second UWB transceiver for communicating with the UWB transceiver of the UWB earpiece;
wherein the UWB earpiece is adapted to communicate an identifier associated with the UWB earpiece to the phone and voice sound information of a user of the phone to the phone.

2. The voice communication system, of claim 1 wherein the sensor is an air conduction sensor.

3. The voice communication system of claim 1 wherein the sensor is a bone conduction sensor.