Answer:
Doppler Effect
Explanation:
Doppler Effect is a term in Physics that describes the phenomenon experienced when there is change in wave frequency during the relative motion between a wave source and its observer.
In other words, it is referred to as increase or decrease in the level of sound, or other waves as the distance between source and observer is closer or farther from each other, such that it causes change in pitch, which is noticeable by the observer.
For example, when a sound object moves towards an individual or observer, the frequency of the sound waves increases, leading to a higher pitch, and at the same time, when the sound object moves away from an individual or observer, the frequency of the sound waves decreases, leading to a lower pitch. E.g passing siren from ambulance.
Hence, in this case, the right answer is DOPPLER EFFECT
The footplate of the stapes rests against the oval window, a membrane that marks the entrance to the inner ear.
The oval window, also known as the fenestra ovalis, is a connective tissue membrane located at the tip of the center ear and also the beginning of the inner ear.
The oval window is the intersection of the center ear with the sense organ and is directly contacted by the stapes; by the time vibrations reach the fenestra, they need been amplified over 10 times from what they were once they contacted the tympanum, a testament to the amplifying power of the center ear.
The variability of the size of the oval window in one human cadaveric study showed wide variation from 1.26 to 2.40 mm
To know more about oval window here
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For this item and the choices we are given, I go with nonresponse. Thus, the answer is letter B. This process of surveying is one of the best there is; however, it faces the disadvantage that not every owner of the homes who have chosen may be kind enough to lend you some of their time to answer the questions.