Noise Suppression based on the interior acoustic field of the Vehicular Chamber

Hands-free communication provides a safer communication system and driving for all road users especially the driver of a vehicle. Many studies have been made to look into the sound quality problem of an automobile and the perceive quality of sound due to noise and other ills that corrupt the speech signal to an extend that the far-end receiver could not even recognize the speaker. Here this paper review the various studies that has been carried out in relation to noises that affect the sound quality and its perception and the improvement to the sound quality either through physical improvements or using adaptive filter cancellation of the noises. The paper also looks into the acoustic room impulse response to achieve a better understanding of the flittering requirements in canceling/suppressing the noises/ills. In addition experiments were carried out to understand the poles and zeros that could affect the sensitivity of the microphones and speakers position.