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High-resolution audio (high-definition audio or HD audio) is a term for audio files with greater than 44.1 kHz sample rate or higher than 16-bit audio bit depth. It commonly refers to 96 or 192 kHz sample rates.
Modern over-the-ear headphones offer incredible sound and impressive noise-cancelling, often for a surprisingly low price. (Photos: 1More, Soundcore, Sony)
A comparison of several sampling rates, depicting their dynamic ranges. 44,056 Hz: An obsolete sampling rate used in Color NTSC. 88.2, 96 kHz and above: High sampling rates are used for recording and production as they can improve audio signal processing and help reduce aliasing during recording.
The frequency response for a conventional LP player might be 20 Hz to 20 kHz, ±3 dB. The low-frequency response of vinyl records is restricted by rumble noise (described above), as well as the physical and electrical characteristics of the entire pickup arm and transducer assembly. The high-frequency response of vinyl depends on the cartridge.
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Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air for anyone nearby ...