Infra, Ultra and Audible Sound

Q.

Write a short note on SONAR and explain its working principle.

Q. Sound with frequencies in the range of $20Hz$ to $20kHz$ are called.

1. audible sound
2. inaudible sound
3. ultrasonic sound

Q.

What are surface waves ?

Q.

Why dogs can hear noises that we can't?

1. Because they have larger ear

2. Because they can hear low volume sounds

3. None of these

4. Because they can hear the frequencies that are greater than the human audible range

Q. How are echoes used in medicines ?

Q.

Describe the principle on which SONAR works.

Q. Sound waves were sent down from a ship and they returned after 2 seconds. What is the depth of the sea, if the speed of sound in water is 1.5 kilometers per second?

Q.

An earthquake produces which type of sound wave before the main shock wave begins?

1. Infrasonic

2. Ultrasonic

3. Audible sound

4. Delta waves

Q.

Waves produced due to the earthquake are known as

1. seismic waves

2. shock waves

3. infrasonic waves

4. none of these

Q.

In nature animals like bats and dolphins, make use of ______________.

Q. what is more powerful infrasonic sound or ultrasonic sound

Q. What are some examples of infrasonic and ultrasonic sounds?

Q. Identify the animal which is capable of hearing infrasound from the following.

1. 
2. 
3. 

Q. Infrasonic vibrations can be heard by which animals and can be produced by whom?

Q.

Give the range of frequency of audible vibrations for the normal human ear?

Q.

What type of frequencies do bats use for echolocation?

1. Ultrasonic
2. Sonic
3. Infrasonic
4. Supersonic

Q.

Mention one practical use of echoes.

Q.

An earthquake produces which kind of sound before the mainshock wave begins

1. ultrasound

2. infrasound

3. audible sound

4. None of these

Q. The audible range for humans is $20Hz$ to $20,000Hz$.

1. True
2. False

Q. A normal human being can listen to sounds with frequency from _________to___________ cycles per sec.

Q. Audible range of human being is_________.

1. $20Hz$ to $10,000Hz$
2. $10Hz$ to $20,000Hz$
3. $20Hz$ to $20,000Hz$
4. $20Hz$ to $2000Hz$

Q. The device which uses ultrasonic sound waves to measure the distance, direction, and speed of underwater objects is:

1. $\text{LASER}$
2. $\text{SONAR}$
3. $\text{RADAR}$
4. $\text{MILER}$

Q.

Choose the applications of ultrasonic sound:

1. Electrocardiography

2. Ultrasonography

3. Cleaning hard-to-reach parts such as spiral tubes etc.

4. SONAR

Q.

Which of the following correctly represents the increasing order of frequency?

1. Infrasound < Audible Range < Ultrasound

2. Ultrasound < Audible Range < Infrasound

3. Audible Range < Ultrasound < Infrasound

4. All are of same frequency

Q.

Which of the following statement(s) is/are correct?

1. Ultrasonic sound has a frequency greater than 20 kHz.

2. Ultrasonic sound has a frequency lesser than 20 kHz.

3. Ultrasonic sound carries high energy compared to infrasound of same amplitude.

4. Ultrasonic sound does not bend appreciably at edges of an obstacle because of its small wavelength.

Q.

Ultrasound can be used for which of the following purposes?

1. True

2. False

3. MRI Scan

4. Loudspeakers

Q. Which of the following use echolocation?

1. Bats
2. Dogs
3. SONAR
4. RADAR

Q.

What part of human body is responsible for the voice production?

1. Larynx

2. Tongue

3. Windpipe

4. None of these

Q. The intensity of sound is measured in ___.

Q. what is ultrasolography