Speaker minimum resonance frequency measuring device, speaker system, and speaker minimum resonance frequency measuring method

摘要

The sine wave output unit 2 (audio output unit) outputs an audio signal having a predetermined frequency to the speaker (10). The sound collecting unit (3) collects the sound output from the speaker (10). The signal output control unit (41) controls the frequency of the audio signal to be output to the speaker (10) and the presence / absence of signal output. The frequency measuring unit (43) measures the frequency of the sound picked up by the sound collecting unit (3) after each audio signal output to the speaker (10) is stopped. The determination unit (44) determines that the frequency of the audio signal is higher than the lowest resonance frequency of the speaker (10) when the measured frequency is lower than the frequency of the audio signal.