BROADCAST SYSTEM SOUND OUTPUT CONTROLLER AND METHOD FOR CONTROLLING SOUND OUTPUT

摘要

PROBLEM TO BE SOLVED: To calculate a sound signal control value corresponding to a change in noise environment by using a simple configuration.SOLUTION: A noise signal extraction unit compares a sound signal and a broadcast program signal detected from three or more directional microphones having mutually different directivities and a microphone disposed separately from the directional microphones to extract a noise detection signal. A noise source position calculation unit specifies the position of a noise source on the basis of the direction of the noise source specified on the basis of the directions of the directivities of the directional microphones and the noise detection signal, the noise detection signal in the prescribed directional microphones and the other microphones, and information about the positions of the prescribed directional microphones and the other microphones. A noise source sound pressure calculation unit calculates a sound pressure level of noise at the noise source from the noise detection signal and the position of the noise source. A control value calculation unit calculates a control value for controlling a sound signal outputted from a speaker in accordance with the sound pressure level of noise at a speaker position calculated from the position of the noise source, the sound pressure level of noise, and speaker position information.