Respuesta :

emryskallanger

Answer:

utrasonic

Explanation:

these are sounds beyond our hearing capacity range of 20-20kHz

alonna2000
Sounds with frequencies below 20 hertz are called infrasound. Infrasound is too low-pitched for humans to hear. Sounds with frequencies above 20,000 hertz are called ultrasound. Ultrasound is too high-pitched for humans to hear.

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