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Logarithmic chart of the hearing ranges of some animals [1] [2] Hearing range describes the frequency range that can be heard by humans or other animals, though it can also refer to the range of levels. The human range is commonly given as 20 to 20,000 Hz, although there is considerable variation between individuals, especially at high ...
A 1973 report cites a university study of fifty cases of people complaining about a "low throbbing background noise" that others were unable to hear. The sound, always peaking between 30 and 40 Hz (hertz), was found to only be heard during cool weather with a light breeze, and often early in the morning. These noises were often confined to a 10 ...
The loudest band in the world is a subject of some dispute in musical circles. Many bands have claimed to be the loudest, measuring this in various ways including with decibel meters at concerts and by engineering analysis of the CDs on which their albums are published.
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Cassette noise, which was predominately high frequency and unavoidable given the small size and speed of the recorded track could be made subjectively much less important. The noise sounded 10 dB quieter, but failed to measure much better unless 468-weighting was used rather than A-weighting.
A mechanical metronome's tempo is usually adjustable from 40 to 208 BPM. The most-common arrangement of tempos on a Maelzel metronome begins with 40 beats per minute and increases by 2 BPM: 42 44 46 48 50 52 54 56 58 60, then by 3 BPM: 63 66 69 72, then by 4 BPM: 76 80 84 88 92 96 100 104 108 112 116 120, then by 6 BPM: 126 132 138 144, then by ...
The chart was first published in the March 16, 1996, issue of Billboard; however, historically, the chart's introduction was in October 1995, when it began as a test chart. [ 3 ] The Adult Top 40 chart was formed following a split of the "Hot Adult Contemporary" chart due to the growing emergence of Adult Top 40 radio stations in the 1990s.
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