Question

What is sound? How many types of sound are there? Name them and and express them briefly.

Answer 1

If the medium is moving, this movement may increase or decrease the absolute speed of the soundwave depending on the direction of ...
there are two main type of sound waves transversion and longitudinal

Answer 2

Answer:

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Sound is a pressure wave which is created by a vibrating object. This vibrations set particles in the sur- rounding medium (typical air) in vibrational motion, thus transporting energy through the medium.

Explanation:

There are two types of sound, Audible and Inaudible. Inaudible sounds are sounds that the human ear cannot detect. The human ear hears frequencies between 20 Hz and 20 KHz. Sounds that are below 20 Hz frequency are called Infrasonic Sounds.