Microphone with ultrasound/audible mixing chamber to secure...

Details Microphone with ultrasound/audible mixing chamber to secure... Microphone with ultrasound/audible mixing chamber to secure...

2004-11-18

2009-08-25

Mei, Xu (Department: 2614)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Digital audio data processing system

C381S111000, C381S122000

Reexamination Certificate

active

07580762

ABSTRACT:
Methods, microphones, and systems are provided for processing sound waves. The sound waves are detected with a portable device (such as a microphone) and an audio signal representing the sound waves is generated. A security layer is applied to the audio signal within the portable device (e.g., by encrypting the audio signal), so that only authorized entities may access the audio signal. The audio signal is then outputted from the portable device to an external computer, which can remove the security layer to access the audio content within the audio signal.

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Supplemental Response dated Dec. 11, 2008, U.S. Appl. No. 10/930,493, filed Aug. 31, 2004.

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