Basics
The back and forth motion of an object is called-
Vibration
The outer part of the ear that collects sound is called?
Ear pinna!
If a pendulum makes 20 vibrations in a 4 seconds , find its Frequency.
f=20/4= 5 Hz
The range of audible sound for humans is-
20 Hz to 20,000 Hz
Unpleasant or unwanted sound is called---
Noise
The sound can not travel through.
Vacuum
The thin membrane that vibrates with sound is called?
Eardrum
If the frequency of a vibrating body is 10 Hz. find its time period.
T=1/10=0.1 s
The Sound with frequency below 20 Hz is called?
Infrasonic
Which range of sound is considered noise?
Above 80 dB
The unit of frequency is-
Hertz(Hz)
The nerve that carries sound signals to the brain is-
Auditory nerve
Sound with frequency above 20,000 Hz is called-
Ultrasonic sound
Which type of pollution cause hearing impairment?
noise
A sound wave can travel through is----?
A Medium!
What are three bones which make up the middle ear?
malleus, incus, Stapes
A sound wave has a frequency of 200 Hz. than what is its time period.
T = 1/200 = 0.005 s
Which type of sound is used in SONAR?
Ultrasonic
Which heath problems we can be observe effects of noise pollution?
lack of sleeping, anxieties, headache
The coiled , snail-shaped part of the inner ear is-
cochlea
If a body vibrates 300 times in 5 seconds, find the frequency.
f = 300/5 =60 Hz
Which animal uses ultrasonic sound for navigation?
Bat
The sound which range is Above 80 dB but may joy us to hear and attract toward enjoyment is...
Music.