DTMF decoder

A DTMF decoder is a device that recognizes the tones generated when pressing keys on a telephone keypad. Each key produces a unique combination of two tones, which the decoder detects and converts into digital signals that a system can understand. This allows computers or communication systems to identify which key was pressed, enabling functions like dialing numbers or controlling devices remotely. In essence, a DTMF decoder translates the sound signals from keypad presses into data that electronic systems can process accurately and efficiently.