Source: https://insight.rpxcorp.com/pat/US7130431B2
Timestamp: 2019-08-24 13:37:11
Document Index: 288595599

Matched Legal Cases: ['§120', '§119', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60']

Patent US 7,130,431 B2
a second windscreen disposed across said acoustic port of said second microphone housing, wherein said first and second transducers include a front and a rear surface, wherein said front surfaces are acoustically coupled to respective said acoustic ports in said microphone housings.
Motor vehicle microphone arrangement
US 20050190943A1
MICROPHONE ASSEMBLY AND ELECTRONIC DEVICE USING SAME
US 20130329931A1
a second windscreen disposed across said acoustic port of said second microphone housing, wherein said microphone housings have at least two acoustic ports and wherein said windscreens are sealed across said acoustic ports.
This application is a divisional of U.S. patent application Ser. No. 09/724,119, entitled “VEHICLE ACCESSORY MICROPHONE,” filed on Nov. 28, 2000 now U.S. Pat. No. 6,614,911, by Alan R. Watson et al., which is a continuation-in-part of U.S. patent application Ser. No. 09/444,176, entitled “VEHICLE ACCESSORY MICROPHONE,” filed on Nov. 19, 1999 by Robert R. Turnbull et al., and which is continuation under 35 U.S.C. §120 of International PCT Application No. PCT/US00/31708, filed on Nov. 17, 2000. U.S. patent application Ser. No. 09/724,119 also claims priority under 35 U.S.C. §119(e) on U.S. Provisional Patent Application No. 60/195,509, entitled “VEHICLE REARVIEW MIRROR ASSEMBLY INCORPORATING A COMMUNICATION SYSTEM,” filed on Apr. 6, 2000 by Robert R. Turnbull et al.; on U.S. Provisional Patent Application No. 60/216,297, entitled “VEHICLE REARVIEW MIRROR ASSEMBLY INCORPORATING A COMMUNICATION SYSTEM,” filed on Jul. 6, 2000 by Robert R. Turnbull et al.; on U.S. Provisional Patent Application No. 60/221,307, entitled “AUTOMOTIVE MICROPHONE INTERFACE CIRCUIT,” filed on Jul. 28, 2000 by Robert R. Turnbull et al.; and on U.S. Provisional Patent Application No. 60/242,465, entitled “VEHICLE REARVIEW MIRROR ASSEMBLY INCORPORATING A COMMUNICATION SYSTEM,” filed on Oct. 23, 2000 by Robert R. Turnbull et al.
FIG. 31 shows a process diagram for the adaptive filter as implemented in DSP 2220. As depicted in block 2225, the analog audio signal from transducer(s) 2210 is converted into a digital audio signal. A fast Fourier transform (FFT) is then performed on the digitized audio signal as shown in block 2230. An example of an FFT of an audio signal including a speech signal and noise is shown in FIG. 32. Using the FFT of the digitized audio signal, the fundamental frequency of the speech signal is determined as depicted in block 2235. DSP 2220 identifies the fundamental frequency by identifying frequency components in the FFT that have amplitudes exceeding a predetermined threshold, and then identifying the fundamental frequency as the difference in frequency of those frequency components having an amplitude above the predetermined threshold. As apparent from the examplary FFT shown in FIG. 32, the highest peaks are separated by an amount equal to the fundamental frequency f<sub>0 </sub>and appear at frequencies that are at multiples of the fundamental frequency. Those peaks in the FFT correspond to the harmonic frequency components of a person's speech.
381/92, 381355-359