Speaker calibration method, apparatus and program

A device for speaker calibration, comprising:

• processing circuitry;
• a first speaker;
• a second speaker;
• and
• a microphone,
• wherein the processing circuitry is configured to generate a first filtered signal by filtering an input signal;
• the first speaker is configured to produce sound based on the first filtered signal;
• the processing circuitry is configured to generate a second filtered signal by filtering the input signal;
• the processing circuitry is configured to generate a gain multiplied signal by multiplying the second filtered signal by a gain;
• the second speaker is configured to produce sound based on the gain multiplied signal;
• the microphone is installed at a mute position at which the sound produced by the first speaker and the sound produced by the second speaker are to be muted;
• and
• the processing circuitry is configured to control gain such that a root mean square of a collected sound signal collected by the microphone is smaller than a root mean square of the collected sound without gain control.