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ICASSP
2008
IEEE

Ultrasonic Doppler sensor for speaker recognition

14 years 6 months ago
Ultrasonic Doppler sensor for speaker recognition
In this paper we present a novel use of an acoustic Doppler sonar for multi-modal speaker identification. An ultrasonic emitter directs a 40kHz tone toward the speaker. Reflections from the speaker´s face are recorded as the speaker talks. The frequency of the tone is modified by the velocity of the facial structures it is reflected by. The received ultrasonic signal thus contains an entire spectrum of frequencies representing the set of all velocities of facial components. The pattern of frequencies in the reflected signal is observed to be typical of the speaker. The captured ultrasonic signal is synchronously analyzed with the corresponding voice signal to extract specific characteristics that can be used to identify the speaker. Experiments show that the information this can result in significant improvements in speaker identification accuracy both under clean conditions and in noise. This work may not be copied or reproduced in whole or in part for any commercial purpose...
Kaustubh Kalgaonkar, Bhiksha Raj
Added 30 May 2010
Updated 30 May 2010
Type Conference
Year 2008
Where ICASSP
Authors Kaustubh Kalgaonkar, Bhiksha Raj
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