What if the speed of sound in air depended on its frequency? Class 9
What if the speed of sound in air depended on its frequency? Class 9
What if (Page 196)
Question 1.
What if the speed of sound in air depended on its frequency? Would music still sound pleasant when a singer performs with instruments? Why or why not? Class 9
Answer:
No, music would not sound pleasant. If the speed of sound depended on frequency, different sound waves (notes) would travel at different speeds and reach the listener at different times. This would distort the combination of sounds from the singer and instruments, making the music unclear and unpleasant.
Question 2.
What if humans could detect ultrasonic waves like dogs can? What would be the advantages and disadvantages? (Page 202) Class 9
Answer:
If humans could detect ultrasonic waves, we would be able to hear very high-frequency sounds beyond our current hearing range.
Advantages:
- Better detection of hazards like gas leaks or high-frequency alarms
- Improved medical and technological applications (e.g., ultrasound monitoring)
- Ability to sense movements or objects using reflected sound (like echolocation)
Disadvantages:
- Increased noise and disturbance from devices emitting ultrasonic sounds
- Difficulty in concentrating due to extra sounds
- Possible discomfort or stress due to continuous exposure to high-frequency sounds