What happens to sound waves from an object as it moves toward you?(1 point)
Responses
The pitch gets lower because of an increase in wavelength.
The pitch gets lower because of an increase in wavelength.
The pitch gets lower because of an increase in frequency.
The pitch gets lower because of an increase in frequency.
The pitch gets higher because of an increase in wavelength.
The pitch gets higher because of an increase in wavelength.
The pitch gets higher because of an increase in frequency.
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The pitch gets higher because of an increase in frequency.
The correct response is: The pitch gets higher because of an increase in frequency.
The correct answer is: The pitch gets higher because of an increase in frequency.
When an object moves towards you, the sound waves it produces become compressed, resulting in a higher frequency and therefore a higher pitch. This is known as the Doppler effect. The Doppler effect occurs because the motion of the object changes the relative distance between the source of the sound waves and the observer. As the object moves closer, the sound waves are "bunched up" and the frequency of the waves increases, leading to a higher perceived pitch.
To understand why the pitch gets higher, you can use the formula for the Doppler effect:
f' = ( ( v + v₀ ) / ( v - vₒ ) ) * f
In this equation, f' represents the observed frequency, f is the actual frequency of the sound waves, v is the speed of sound, v₀ is the velocity of the object, and vₒ is the velocity of the observer.
If the object is moving towards you (v₀ is positive), then the term ( v + v₀ ) / ( v - vₒ ) will be greater than 1, causing the observed frequency (f') to be higher than the actual frequency (f).
Therefore, as the object moves towards you, the pitch gets higher due to an increase in frequency.