I am building a system which can generate sound frequencies which the human ear can hear and also sound that we cannot hear too.
For example, for the human ear: 20 Hz to 20 kHz
I need a speaker which can generate sound tones varying from 0Hz to 100kHz. Do we have some micro speakers or normal speakers that can do so?
I am still doing research but I am out of keyword for my research and I don't know where to find this speaker.
Does anyone know about ultrasonic sound frequency generator device? Thank you!