Characteristic correcting device and characteristic correcting method

A characteristic correcting method comprising:

• correcting, by a correction filter, sound quality characteristics of a plurality of bands in a frequency range of an input signal based on a frequency characteristic which is set in advance to generate an output signal;
• inputting, by an input module, a surrounding sound signal of sound around an output device outputting the output signal;
• and
• reducing, by an adjusting module, the number of the bands of which the sound quality characteristics are to be corrected of the bands in the frequency range of the input signal in accordance with an increase in amplitude of the surrounding sound signal which is input,
• wherein the reducing includes reducing the number of the bands of which the sound quality characteristics are to be corrected of the bands in the frequency range of the input signal except a neighborhood of a resonance frequency of the output device.