Answer:
Frequency invoice
Explanation:
When several times the voice repeating occurs in a limited period. It is in the form of waves. It is also called a voice band means that the frequencies occur within the part of audio that is used for the transition of speech of a person or animal. It is a fundamental frequency in human voice especially in males ranges from 80 to 180 Hz and in the female, it ranges from 165 to 255. The fundamental frequency falls below the voice frequency. In this process the sound works as an acoustic sound source: