1. Why is study of sound important?
Answer:. Study of sound helps us to know how speech is produced
there by to correct speech impairment.
2. What is an echo?
Answer: A Sound heard after reflection from a rigid surface is called Echo.
3. What is Audible range?
Answer: 20 HZ to 20000HZ
4. What is infrasonic sound.
Answer: A sound of frequency less that 20HZ is called infrasonic sound.
5. What is ultrasonic sound?
Answer: A sound of frequeny greater than 20000 HZ is called ultrasonic sound.
6. Name some animals which can produce ultrasound.
Answer: Bats, Dolphines, dogs
7. Name some animals which can here ultrasound.
Answer: Bats, Dolphines.
8. Why the energy of ultrasound is high?
Answer: Because of high frequency.
9. What is SONAR
Answer: Sonar stands for “SOUND NAVIGATION AND RANGING”
10. What are the uses of sonar?
Answer: 1. To measure depth of sea.
2. To locate underwater objects.
11. Which are the two parts of Sonar?
Answer: 1. Transmitter 2. Detector
12. What is the function of transmitter in SONAR?
Answer: A Transmitter produces ultrasound waves and transmits them in to the water all around.
13. What is the function of detector in SONAR?
Answer: A detector detector the reflected ultrasound waves and coverts it to electrical signals
14. What is persistence of hearing?
Answer: The sensation of sound persists in our ear for about 0.15, this is called persistence of hearing.
15. What is the minimum distance from the obstacle to hear a clear echo?
Answer: 17m
16. When can we here a multiple echo?
Answer: If the sound reflects from the number of reflecting surface then we can hear multiple echos.
17. How do we hear thunder?
Answer: We hear thunder by the multiple reflections of sound from many reflecting surface of clouds.
18. When is sound produced.
Answer: Sound is produced by the vibration of bodies.
Answer:. Study of sound helps us to know how speech is produced
there by to correct speech impairment.
2. What is an echo?
Answer: A Sound heard after reflection from a rigid surface is called Echo.
3. What is Audible range?
Answer: 20 HZ to 20000HZ
4. What is infrasonic sound.
Answer: A sound of frequency less that 20HZ is called infrasonic sound.
5. What is ultrasonic sound?
Answer: A sound of frequeny greater than 20000 HZ is called ultrasonic sound.
6. Name some animals which can produce ultrasound.
Answer: Bats, Dolphines, dogs
7. Name some animals which can here ultrasound.
Answer: Bats, Dolphines.
8. Why the energy of ultrasound is high?
Answer: Because of high frequency.
9. What is SONAR
Answer: Sonar stands for “SOUND NAVIGATION AND RANGING”
10. What are the uses of sonar?
Answer: 1. To measure depth of sea.
2. To locate underwater objects.
11. Which are the two parts of Sonar?
Answer: 1. Transmitter 2. Detector
12. What is the function of transmitter in SONAR?
Answer: A Transmitter produces ultrasound waves and transmits them in to the water all around.
13. What is the function of detector in SONAR?
Answer: A detector detector the reflected ultrasound waves and coverts it to electrical signals
14. What is persistence of hearing?
Answer: The sensation of sound persists in our ear for about 0.15, this is called persistence of hearing.
15. What is the minimum distance from the obstacle to hear a clear echo?
Answer: 17m
16. When can we here a multiple echo?
Answer: If the sound reflects from the number of reflecting surface then we can hear multiple echos.
17. How do we hear thunder?
Answer: We hear thunder by the multiple reflections of sound from many reflecting surface of clouds.
18. When is sound produced.
Answer: Sound is produced by the vibration of bodies.
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