Acoustic adjustment assistance device, acoustic adjustment device, acoustic adjustment assistance method, and non-transitory recordable medium

An acoustic adjustment assistance method, comprising:

• acquiring signals based on acoustic signals output from a plurality of output channels provided in a vehicle cabin of a vehicle at positions corresponding to both ears of a listener provided in the vehicle cabin;
• and
• generating display information for display on a display part, the display information showing at least one of a relationship between an interaural level difference and a frequency and a relationship between an interaural phase difference and the frequency in the acoustic signal.

A non-transitory recordable medium recording a program that, when executed by a computer, causes the computer to function as:

• an acquisition part that acquires signals based on acoustic signals output from a plurality of output channels provided in a vehicle cabin of a vehicle at positions corresponding to both ears of a listener provided in the vehicle cabin;
• and
• a generation part that generates display information for display on a display part, the display information showing at least one of a relationship between an interaural level difference and a frequency and a relationship between an interaural phase difference and the frequency in the acoustic signal.