Leakage inspection apparatus, program, and control method

Signal acquisition unit (2020) acquires the signal. Test signal extracting unit (2060) from the signal the signal acquisition unit (2020) is acquired, as a test signal a signal of any frequency band of the plurality of partial inspection frequency bands obtained by dividing the frequency band to be inspected Extract. Determination unit (2070) for each test signal corresponding to the different parts inspection frequency bands respectively, when the test signal is sequentially determined whether showing a leakage, a predetermined number or more of the test signal does not indicate a leak it is determined that the leakage does not occur.