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Sound Class 9 PPT
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Page 1
SOUND
Heinrich Rudolph Hertz
(1857 – 1894)
Page 2
SOUND
Heinrich Rudolph Hertz
(1857 – 1894)
1. Sound
2. Experiments with Vibrating Tuning Fork
3. Production of Sound
4. Propagation of Sound
5. Sound Waves in Air
6. Sound Needs Material Medium to Travel
– Bell Jar Experiment
1. Characteristics of a Sound Wave
2. Reflection of Sound
3. Reverberation
4. Uses of Multiple Reflection
5. Range of Hearing
6. Infrasonic and Ultrasonic Sound
7. Uses of Ultrasonic Sound
8. SONAR
Page 3
SOUND
Heinrich Rudolph Hertz
(1857 – 1894)
1. Sound
2. Experiments with Vibrating Tuning Fork
3. Production of Sound
4. Propagation of Sound
5. Sound Waves in Air
6. Sound Needs Material Medium to Travel
– Bell Jar Experiment
1. Characteristics of a Sound Wave
2. Reflection of Sound
3. Reverberation
4. Uses of Multiple Reflection
5. Range of Hearing
6. Infrasonic and Ultrasonic Sound
7. Uses of Ultrasonic Sound
8. SONAR
Sound is a form of energy which gives sensation of hearing to us.
Sound is produced due to vibration of a body.
It is a form of mechanical energy.
Sound is produced by:
• Vocal cords of human being
• Birds and animals
• Bell
• Vehicles
• Musical instruments like guitar, veena, violin, piano,
harmonium, flute, shehnai, tabla, drums, cymbals, etc.
SOUND
Page 4
SOUND
Heinrich Rudolph Hertz
(1857 – 1894)
1. Sound
2. Experiments with Vibrating Tuning Fork
3. Production of Sound
4. Propagation of Sound
5. Sound Waves in Air
6. Sound Needs Material Medium to Travel
– Bell Jar Experiment
1. Characteristics of a Sound Wave
2. Reflection of Sound
3. Reverberation
4. Uses of Multiple Reflection
5. Range of Hearing
6. Infrasonic and Ultrasonic Sound
7. Uses of Ultrasonic Sound
8. SONAR
Sound is a form of energy which gives sensation of hearing to us.
Sound is produced due to vibration of a body.
It is a form of mechanical energy.
Sound is produced by:
• Vocal cords of human being
• Birds and animals
• Bell
• Vehicles
• Musical instruments like guitar, veena, violin, piano,
harmonium, flute, shehnai, tabla, drums, cymbals, etc.
SOUND
PRODUCTION OF SOUND
Vibrating tuning fork
splashes water.
Vibrating tuning fork makes
the pendulum bob to oscillate.
(Tuning fork vibrations were
shown in slow motion.)
Page 5
SOUND
Heinrich Rudolph Hertz
(1857 – 1894)
1. Sound
2. Experiments with Vibrating Tuning Fork
3. Production of Sound
4. Propagation of Sound
5. Sound Waves in Air
6. Sound Needs Material Medium to Travel
– Bell Jar Experiment
1. Characteristics of a Sound Wave
2. Reflection of Sound
3. Reverberation
4. Uses of Multiple Reflection
5. Range of Hearing
6. Infrasonic and Ultrasonic Sound
7. Uses of Ultrasonic Sound
8. SONAR
Sound is a form of energy which gives sensation of hearing to us.
Sound is produced due to vibration of a body.
It is a form of mechanical energy.
Sound is produced by:
• Vocal cords of human being
• Birds and animals
• Bell
• Vehicles
• Musical instruments like guitar, veena, violin, piano,
harmonium, flute, shehnai, tabla, drums, cymbals, etc.
SOUND
PRODUCTION OF SOUND
Vibrating tuning fork
splashes water.
Vibrating tuning fork makes
the pendulum bob to oscillate.
(Tuning fork vibrations were
shown in slow motion.)
‘
‘
‘
Vibrating blade produces sound.
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Document Description: PPT: Sound for Class 9 2025 is part of Physics Class 9 ICSE preparation.
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