A person recently asked me what I meant by the term business system.. I thought others might like to know a definition that works for me. A system is a procedure, process, method, or course of action designed to achieve a specific result.
The voiced speech of a typical adult male will have a fundamental frequency from 85 to 180 Hz, and that of a typical adult female from 165 to 255 Hz. Thus, the fundamental frequency of most speech falls below the bottom of the voice frequency band as defined above.
And Low pitched sounds like the sound that a subwoofer makes have a low frequency (Not so many waves per second) The average human can hear from 20hz (cycles per second) up to around 20,000hz (cycles per second).