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By Hector Perez Meana

Audio and speech processing have accomplished very important prestige in improvement within the final 3 a long time, enhancing the traditional of dwelling of many of us. relating to those purposes, numerous sign processing algorithms were constructed to aid the speech impaired and increase the educational skill of kids. Advances in Audio and Speech sign Processing: applied sciences and functions presents a complete method of sign processing instruments in regards to the enhancement, reputation, and safeguard of speech and audio indications. Advances in Audio and Speech sign Processing: applied sciences and purposes bargains researchers and practitioners the knowledge they should enhance and enforce effective sign processing algorithms within the enhancement box.

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Extra resources for Advances in Audio and Speech Signal Processing: Technologies and Applications

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5 2 2. 5 F requency (kHz) (e) Power spectral density 3 3. 5 -100 0 0. 5 1 1. 5 2 2. 5 3 3. 5 F requency (kHz) (f) Power spectral density Copyright © 2007, Idea Group Inc. Copying or distributing in print or electronic forms without written permission of Idea Group Inc. is prohibited. TEAM LinG  Jovanovc Dolecek & Fernandez Vazquez Figure 5. Speech signal with added noise P ower S pectral Dens ity E s timate via W elch S ignal + nois e -20 5 4 -30 P ower/frequency (dB /Hz ) 3 Amplitude 2 1 0 -1 -2 -40 -50 -60 -70 -3 -4 0 500 1000 1500 2000 2500 Time 3000 3500 4000 4500 -80 0 (a) Time domain 0.

5 0. 6 0. 7 0. 8 Normaliz ed F requency (×p rad/s ample) 0. 9 1 (b) Cut filter Copyright © 2007, Idea Group Inc. Copying or distributing in print or electronic forms without written permission of Idea Group Inc. is prohibited.

This excitation is then modulated by the movement of the oral cavity to produce the speech sound. This transducer is attached to the speaker’s neck, and in some cases in the speaker’s cheeks. The ALT is widely recommended by voice rehabilitation physicians because it is very easy to use, even for new patients, although the voice produced by these transducers is unnatural and with low quality, and besides that it is distorted by the ALT produced background noise. This results in a considerable degradation of the quality and intelligibility of speech, a problem for which an optimal solution has not yet been found.

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