Speccy is a simple Spectrum Analysis tool, which uses a ‘Hanning Window’ signal processing technique to calculate the amplitude of audible frequencies detected through your device’s microphone.

It has a number of applications. For example, it might help you get into a safe or combination lock in case you forgot the combination. Using the spectrum analyzer with your device acoustically coupled to the safe’s dial, turning the dial slowly, you can ‘hear’ when the tumblers drop (the spectrum of the sound will be very slightly different than turning one ‘normal’ tick, depending on the build quality of the safe or combination lock) and know you’ve hit a correct number.

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Category: Tools
Requirements: 4.0 and up