Tag: study of sound

Quizzes (14) Questions (314)

Questions Related to study of sound

Multiple choice audible, infra and ultra sound with its application study of sound physics

The frequency which is not audible to the human ear is :

  1. 50 Hz

  2. 500 Hz

  3. 5000 Hz

  4. 50000 Hz
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The audible frequency range for human ear is from 20Hz to 20,000Hz , as out of the given frequencies , only frequency of 50000Hz doesn't lie in audible range , therefore it cannot be heard by human ear .

Multiple choice audible, infra and ultra sound with its application study of sound physics

Audible vibrations have a frequency range of above 20,000 Hz. True or false.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The human hear can respond to minute pressure variations in the air if they are in the audible frequency range, roughly 20 Hz to 20,000 Hz. The vibrations above or below this range is not audible by human.

Multiple choice audible, infra and ultra sound with its application study of sound physics

We can hear sound of frequency -

  1. 1 Hz

  2. 100 Hz

  3. 10 Hz

  4. 40,000 Hz
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Humans cannot hear sound of every frequency. The range of hearing for a healthy young person is 20 Hz to 20,000 Hz. This is called audible range of frequency. So, human can hear sound of frequency 100 Hz.

Multiple choice audible, infra and ultra sound with its application study of sound physics

Which of the following animals can hear infrasounds?
a) Whale, b) Octopus, c) Rhino, d) Bat

  1. a, b and c

  2. a, b and d

  3. a and d

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Some animals like whale, octopus and rhino have special hearing abilities and can hear sounds below $20\ Hz$, i.e., the infrasounds.

Multiple choice audible, infra and ultra sound with its application study of sound physics

The sounds that cannot be heard by humans are 

  1. inaudible sounds

  2. infrasounds

  3. ultra sounds

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Humans can hear sounds having frequencies between the range of $20\ Hz$ and $20,000\ Hz$. The sounds above and below this range are inaudible to humans. The sounds below the range of $20\ Hz$ are called infrasounds and the sounds above the range of $20,000\ Hz$ are called ultrasounds. Both are inaudible to humans.

Multiple choice audible, infra and ultra sound with its application study of sound physics

Which of the following sounds are not audible?

  1. a tuning fork vibrating 400 times in 2 sec.

  2. a tuning fork vibrating 3600 times in 60 s.

  3. tuning fork vibrating 1 time in 1 sec

  4. tuning fork vibrating 900 times in 2 sec
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The range of audible frequency is 20 Hz - 20,000 Hz.
In the first case frequency of the tuning fork will be 200 Hz. 
In second case it will be 60 Hz.
In third case frequency will be 1 Hz ,which is out of the audible frequency range.

Multiple choice audible, infra and ultra sound with its application study of sound physics

Why we can hear the sound produced by bees but we cant hear the sound of vibrations of pendulum?

  1. Sound of vibrations of pendulum is in audible rays

  2. Sound of bees are in audible range

  3. Sound of bees are in infrasonic range while sound of vibrations of pendulum are in ultrasonic range

  4. None is true
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sound of vibrations of pendulum lies in infrasonic range while sound of bees lies in audible range.