SELECTING AND INTRODUCING METHOD FOR SOUND

摘要

PURPOSE:To introduce only external sound where desired sound exists into a sound isolation space discriminating whether or not the desired sound exists the external sound which reaches the sound insulation space by means of a computer. CONSTITUTION:The comparison of desired sound to be stored in the signal processor 3 of the computer with external sound, which is inputted from a microphone 1, is executed by means of a persona computer by one of or a combination of a correlation coefficient method, a residual energy method of a filter method using power density spectral estimation quantities of the two. At the time of external sound including desired sound, the switch of the reproducing circuit of external sound is turned on and it is introduced into a sound isolation space D by the use of a speaker.