Olympiad Test: Sound - 2 - Class 8 MCQ

The to-and-fro motion of a body about its mean position can be described as "oscillation".

The outer ear (which includes the visible ear and ear canal) is the part that collects sound waves from the air. These sound waves then travel through the ear canal to the middle ear, where they cause the eardrum to vibrate. Afterward, the vibrations are transmitted to the inner ear, specifically to the cochlea, where they are converted into nerve signals that the brain interprets as sound.

So, the outer ear starts the process of picking up sound vibrations.

The frequency of sound produced by a stringed instrument depends on:

1. Tightness (Tension) of the string – Higher tension increases frequency (pitch).

2. Length of the string – Shorter strings produce higher frequencies.

3. Thickness (Mass per unit length) of the string – Thicker strings vibrate slower, producing lower frequencies.
    

   Thus, all three factors (a, b, and c) affect the frequency.

   Final Answer: (d) all of the above