Question

1 The sounds having frequencies above 20,,000Hz and below 20 Hz Are known as*​

Answer 1

Answer:

• Sounds with frequencies below 20 hertz are called infrasound.

• Sounds with frequencies above 20,000 hertz are called ultrasound.

Explanation:

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Answer 2

Answer:

Sounds with frequencies above 20,000 hertz are called ultrasound. For example, dogs can hear sounds with frequencies as high as 50,000 Hz.

Sounds with frequencies below 20 hertz are called infrasound. Infrasound is too low-pitched for humans to hear.

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