KHz and others to 4 kHz only. The application of ultrasound frequencies: - generators can be design

So, can you listen to human voices Lalla ranging frequencies between 20 Hz and 20 kHz, while clearly Ttohn all the votes of less than 20 Hz or above 20 kilohertz (20,000 hertz). For this reason, the audio designers develop the so-called "letter candidate" only audio frequencies to pass as is the case in their own computers, sound cards, for example. Hearing when the animals: -
KHz and others to 4 kHz only. The application of ultrasound frequencies: - generators can be designed ultrasonic sensors astoria veterinary group and ultrasound for use in many industrial and medical applications such as:
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