Bats rely on sound localization to be able to fly during the night. On a cool 20°C summer night, a bat produces an ultrasonic sound with a frequency of 39 kHz. What is the wavelength of this ultrasound, in meters?

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Bats rely on sound localization to be able to fly during the night. On a cool 20°C summer night, a bat produces an ultrasonic sound with a frequency of 39 kHz. What is the wavelength of this ultrasound, in meters?

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Answer 1 · 2018-04-05T22:37:50

$approx .01m$

Explanation:

An ultrasonic sound with a frequency of $39 kHz$ completes $39,000$ cycles per second (Hertz). Also, a Google search reveals that sound travels $343$ meters per second in dry air at $20° C$ . That means $39,000$ wavelengths occur in $343$ meters. So one of those wavelengths would be a little under $1cm$ :

$frac{343m}{39,000Hz} approx 0.0087948718m approx .01m$

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Bats rely on sound localization to be able to fly during the night. On a cool 20°C summer night, a bat produces an ultrasonic sound with a frequency of 39 kHz. What is the wavelength of this ultrasound, in meters?

1 Answer

Explanation:

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