Author(s): Suat VERGÄ°LÄ°
In audio technology and acoustics, speech intelligibility is accepted as the measure of intelligibility of speech in relation to the properties of environment in which the speech signal is transmitted. These properties can be listed as the quality of the speech signal, the acoustical conditions of the space, the properties of the audio devices where the speech signal is being trasmitted and so on. In the field of audio recording - especially in broadcasting and post-production branches where picture and sound take place simultaneously - providing a high level of speech intelligibility is very important. The sound technician provides this basically by recalling the knowledge gained by practical experience and projecting this knowledge to application in an automatic manner. Varying degrees of speech intelligibility can be perceived by careful listeners amongst different examples. In this paper, speech intelligibility in recorded sound will be discussed and the factors affecting speec intelligibility will be evaluated. These factors can be classified as pre and post-production. Pre-production factors can be listed as the quality of the human voice, the acoustical properties of the space and microphone techniques. Post-production factors, on the other hand, are equalization, signal to noise ratio and noise control
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