Interference sound suppressing device, interference sound suppressing method, and non-transitory computer readable recording medium storing interference sound suppressing program

An interference sound suppressing method in a computer, the interference sound suppressing method comprising:

• acquiring an input signal obtained from a microphone;
• acquiring a reference signal;
• increasing an amount of data of the input signal to be larger than an amount of data of the reference signal by inserting a plurality of zeros into the input signal acquired;
• suppressing an interference sound component included in the input signal by using the input signal having the amount of data increased and the reference signal acquired;
• restoring the amount of data of the input signal to an original amount by deleting the plurality of zeros inserted from the input signal in which the interference sound component is suppressed;
• and
• outputting the input signal having the amount of data restored.

A non-transitory computer readable recording medium storing an interference sound suppressing program that causes a computer to function as:

• an input signal acquiring part that acquires an input signal obtained from a microphone;
• a reference signal acquiring part that acquires a reference signal;
• a data inserting part that increases an amount of data of the input signal to be larger than an amount of data of the reference signal by inserting a plurality of zeros into the input signal acquired;
• an interference sound suppressing part that suppresses an interference sound component included in the input signal by using the input signal having the amount of data increased and the reference signal acquired;
• a data deleting part that restores the amount of data of the input signal to an original amount by deleting the plurality of zeros inserted from the input signal in which the interference sound component is suppressed;
• and
• an output part that outputs the input signal having the amount of data restored.