Anything below the range is referred to as infrasonic whilst anything above is ultrasonic. Note: Human’s audible range of frequency is typically between 20Hz to 20kHz (that’s 20,000Hz) and this range is called sonic. It operates 5 channels for normal range speakers (20 to 20,000 Hz) and the 6th channel reserved for low-frequency (20 to 120Hz) sub-woofer operation. AC3 is a kind of file type that is primarily associated with ‘AC3 Audio File Format’ by Dolby Laboratories.ĭolby Surround Audio Coding-3 (AC3) is a 6-channel, audio file format by Dolby Laboratories that usually accompanies DVD viewing.
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