High frequencies produce more oscillations. The units of frequency are called hertz (Hz). Humans with normal hearing can hear sounds between 20 Hz and 20,000 Hz . Frequencies above 20,000 Hz are known as ultrasound.3 Tem 2018
High frequencies produce more oscillations. The units of frequency are called hertz (Hz). Humans with normal hearing can hear sounds between 20 Hz and 20,000 Hz . Frequencies above 20,000 Hz are known as ultrasound.3 Tem 2018