Equipment for making sound of equipment sound, equipment and method for making equipment sound comfortable

摘要

The pleasant sound device A has a frequency that matches or approximates the temporal variation characteristics of the natural world with the casing 111 of the indoor unit 110 on which driving components (fans, motors, etc.) are mounted based on human subjective and physiological response evaluation. The frequency component and the peak frequency component of the band are processed so as not to match or approximate, and the driving component is operated with a signal based on the processed waveform (the processed waveform example 102).