Signal processing method, signal processing device, and recording medium

A signal processing device, comprising:

• a first reception unit configured to receive an acoustic signal transmitted via a first transmission path, the acoustic signal received by the first reception unit being a first acoustic signal;
• a second reception unit configured to receive the acoustic signal transmitted via a second transmission path different from the first transmission path, the second transmission path having a longer delay time for transmission than the first transmission path, and the acoustic signal received by the second reception unit being a second acoustic signal;
• a delay amount calculation unit configured to calculate a transmission delay amount that is a relative delay amount between the first acoustic signal and the second acoustic signal;
• a delay amount addition unit configured to delay the first acoustic signal based on the calculated transmission delay amount;
• and
• an output unit configured to output the delayed first acoustic signal.

A non-transitory computer readable recording medium that stores computer-executable instructions that, when executed, cause the computer to execute:

• a first reception step of receiving an acoustic signal transmitted via a first transmission path, the acoustic signal received by the first reception unit being a first acoustic signal;
• a second reception step of receiving the acoustic signal transmitted via a second transmission path different from the first transmission path, the second transmission path having a longer delay time for transmission than the first transmission path, and the acoustic signal received by the second reception unit being a second acoustic signal;
• a delay amount calculation step of calculating a transmission delay amount that is a relative delay amount between the first acoustic signal and the second acoustic signal;
• and
• a delay amount addition step of delaying the first acoustic signal based on the calculated transmission delay amount;
• and
• an outputting step of outputting the delayed first acoustic signal.