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Electronics / Broadcast engineering / Dual-tone multi-frequency signaling / Goertzel algorithm / Signaling / Telephone keypad / Frequency / Electronic filter / Discrete Fourier transform / Electronic engineering / Digital signal processing / Mathematical analysis
Electronics
Broadcast engineering
Dual-tone multi-frequency signaling
Goertzel algorithm
Signaling
Telephone keypad
Frequency
Electronic filter
Discrete Fourier transform
Electronic engineering
Digital signal processing
Mathematical analysis

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