Question

What is noise. Explain the internal and external noise?

Answer 1

heyyy

noise are the unwanted and unpleasant sound which can further effect our ear causes hearing problems

noise that are produced by vehicle and by sound box are the external

and the sound produce by drilling machines are internal noise

hope it will help you

Answer 2

$\huge\sf{Answer:-}$

(1) Sound is produced by vibrating objects.

(2) In humans beings, the vibration of vocal cords produces sound.

(3) Sound travels through a medium gas , liquid or solid and sound can't travel in vacuum.

(4) The eardrum seses the vibration of sound it sends tge signals to the brain .this process is called hearing.

(5) The number of oscillations or vibrations per seconf is called frequency if oscillation.

(6) The frequency is expressed in hz which means hertz.

(7) Excessive or unwanted sounds lead to noise pollution.Nosise pollution may pose health problems for humans.

(8) Plantation on the roadside and elsewhere can reduce noise pollution.

(9) Unplesant sounds are called noise.

(10) Larger the amplitude of vibration ,the higher is the pitch and shriller is the sound.