An animal that can hear sounds with low frequency than human ear is
In air, change in pressure produces
The medical use of ultrasound is to detect
The exact speed of sound depends upon
The wave with compressions and rarefactions is known as
Ships use echolocation to measure the
An example of 'percussion' is
The louder the sound, the more
Unwanted or unpleasant sounds are known as
Some whales produce songs that travel for about
In air, the speed of sound is
Bats use ultrasound to find its
The loudness of sound depends on
Bats also use 'ultrasound' to prevent
The louder the sound is, the more the amplitude it
The full name of ultrasound is
The melting of a metal with the help of ultrasounds is known as
The thing which also effects the sound produced by vibrating strings, is
The number of things that effect the sound produced by vibrating strings is
When air vibrates in a short thin tube, the level of note is
A wave with ups and downs is known as
The rock concerts have sound level up to
Two similar string instruments are
Notes are put together to produce a pleasing sound known as
Sounds with a high frequency which a human ear can detect are known as
When the hand bell stimulates air particles,
To avoid noise from the surroundings
In water the speed of sound is
The number of sound waves sent per second is known as
Sound travels faster in liquids than air because
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