Question

Can we hear the sound from the Galton whistle having a frequency of \[30000{\rm{ Hz}}\]? Why?

Answer 1

Hint:The ideal audible frequency range for humans is \[20{\rm{ Hz}}\] to \[20,000{\rm{ Hz}}\]. The upper limit of human hearing frequency shrinks to \[15 - 17{\rm{ kHz}}\] for the adults of middle age. Galton whistle is used in the training of animals such as dogs, cats and others. because they can hear this frequency and this is also called a dog whistle.

Complete step by step answer:
The sounds in the frequency range of \[20{\rm{ Hz}}\] to \[20,000{\rm{ Hz}}\] are audible to humans; this range reduces with increase in age of the person but it is found that the sound of frequency lower than \[250{\rm{ Hz}}\] is hard to detect by human ear. People are not able to recognize the sound below \[250{\rm{ Hz}}\], although it is in the audible frequency range. Also, a long duration of exposure to loud noise within the range of audible frequency can cause hearing loss.
The frequency of the sound produced from the Galton whistle is more than the audible frequency range. Therefore, we cannot hear the sound from the Galton whistle having a frequency of \[30000{\rm{ Hz}}\].

Note:The sound of frequency more than the audible range of humans falls into the ultrasonic range category, so we can say that the sound produced by the Galton whistle is of ultrasonic range. The upper hearing range of dogs is around \[45{\rm{ kHz}}\]. The Galton whistle frequency is having a range of \[23{\rm{ kHz}}\] to \[54{\rm{ kHz}}\], so the audible range of humans doesn't fall in the frequency range of sound produced by the Galton whistle.