Humans can typically perceive frequencies that range from 20 Hz–20 kHz. Dogs can hear sounds up to 45 kHz. Dog whistles produce sound waves that range from 23–54 kHz; therefore, they cannot be heard by the human ear.Which statement accurately describes the pitch and wavelength of the sound waves produced by a dog whistle?
Answer
A
high pitch with a long wavelength
B
high pitch with a short wavelength
C
low pitch with a short wavelength
D
low pitch with a long wavelength
Explanation
A dog whistle produces frequencies of 23–54 kHz, which are very high, so the sound has a high pitch. In the same medium, higher-frequency sound waves have shorter wavelengths. Therefore, the correct description is high pitch with a short wavelength.
AI-written and checked against the verified answer.