difference between audible and infrasonic sound ?
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The infrasonic sound is lower in frequency, which is less than 20Hz, i.e. lower than the frequency that can be heard by humans and hence are not audible to them. On the other hand, audible sound belongs to the frequency of 20Hz- 20000Hz, which can be heard by humans
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Audible Sounds are the sounds of frequency which are audible to the human ear. The frequency of audible sounds is usually between 20Hzto20kHz.
Infrasound, in its popular definition as sound below a frequency of 20 Hz, is clearly audible, the hearing threshold having been measured down to 1.5 Hz. The popular concept that sound below 20 Hz is inaudible is not correct.
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