if they are in a void no matter how much the object vibrates it won't produce any sound waves
school bell produces a loud sound bcz the area in contact is grater
Well, it's not necessary for the whole object to vibrate, but the part of it that's producing the sound does. Example: I'm not vibrating when I produce sound, but my vocal chords are, otherwise there's no sound. So the answer to what you're trying to ask is: No.
An object vibrates to produce sound. So a soundmaking object is different from the one that is silent because it produces vibrations that the silent object does not.
Sound is produced when an object moves or vibrates. Without movement there could be no sound. When an object moves or vibrates, the air molecules around the object also vibrate. Vibrating objects (as long as they are not in a vacuum) produce sound.
solid
if they are in a void no matter how much the object vibrates it won't produce any sound waves
elephants and more
school bell produces a loud sound bcz the area in contact is grater
by vibrating
by vibrating
With most hard floors it will, but with things like carpets it won't at all.
Drums.
When a loud object such as a train passes you, there is what is officially known as the Doppler Effect, by which the sound has a higher pitch as the object approaches, and a lower pitch as it passes. The speed of the object, whether approaching or receding, affects the wavelength of the sound.
All you need is an "ultrasonic" signal to come into it.
if they are in a void no matter how much the object vibrates it won't produce any sound waves
By vibration of vocal chords.. High frequency of vibration/low pitch = sweet sound Low frequency of vibration/high pitch = harsh sound High amplitude = loud sound