CONTROLLER FOR BROADCAST SOUND VOLUME IN PUBLIC SPACE

摘要

PURPOSE: To provide a controller for broadcast sound volume always enabling listeners to listen to broadcast even under the environment where a noise level is always varied and preventing the noise from becoming a new noise source for the surrounding environment at the outside of the broadcast range. ;CONSTITUTION: An external sound (synthesized sound between broadcast sound and noise) collected by a measurement means 2 and a reference sound signal separated by a sound amplifier means 6 are compared to detect the noise component included in the external sound and the sound volume amplification factor of the sound amplifier means 6 is determined based on the level of the noise component. Furthermore, the fuzzy deduction is used to determine the sound volume amplification factor to take a listening sense of a human being into consideration.;COPYRIGHT: (C)1993,JPO&Japio