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The dimension of the unit hertz is 1/time (T −1). Expressed in base SI units, the unit is the reciprocal second (1/s). In English, "hertz" is also used as the plural form. [5] As an SI unit, Hz can be prefixed; commonly used multiples are kHz (kilohertz, 10 3 Hz), MHz (megahertz, 10 6 Hz), GHz (gigahertz, 10 9 Hz) and THz (terahertz, 10 12 Hz).
716 Hz: Rotational period of one of the fastest known millisecond pulsars, PSR J1748−2446ad [4] 10 3: 1 kilohertz (kHz) 1 kHz: Usual frequency of a bleep censor: 4.186 kHz: Acoustic – the highest musical note (C 8) playable on a normally-tuned standard piano 8 kHz: ISDN sampling rate 10 4: 10 kHz 14 kHz
These have modern equivalents such as kilohertz (kHz), megahertz (MHz), and gigahertz (GHz). Following the introduction of the SI standard, use of these terms began to fall off in favor of the new unit, with hertz becoming the dominant convention in both academic and colloquial speech by the 1970s. [5]
Measured with a 60 dB SPL signal, the hearing range for the Senegal bushbaby is 92 Hz–65 kHz, and 67 Hz–58 kHz for the ring-tailed lemur. Of 19 primates tested, the Japanese macaque had the widest range, 28 Hz–34.5 kHz, compared with 31 Hz–17.6 kHz for humans. [17]
Clock rate is measured in the SI unit of frequency hertz (Hz). The clock rate of the first generation of computers was measured in hertz or kilohertz (kHz), the first personal computers from the 1970s through the 1980s had clock rates measured in megahertz (MHz).
The audible frequency range for humans is typically given as being between about 20 Hz and 20,000 Hz (20 kHz), ... vibrations up to 60,000 Hz. [12] In many ...
This is a list of the fundamental frequencies in hertz (cycles per second) of the keys of a modern 88-key standard or 108-key extended piano in twelve-tone equal temperament, with the 49th key, the fifth A (called A 4), tuned to 440 Hz (referred to as A440). [1] [2] Every octave is made of twelve steps called semitones.
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