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प्रश्न
The safe limit of loudness of audible sound is
पर्याय
0 to 80 dB
above 80 dB
120 dB
above 120 dB
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उत्तर
0 to 80 dB
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संबंधित प्रश्न
Name the factor that determines Quality of the note
Decibel is the unit of pitch of a sound.
The pitch of a flute is decreased by ................... length of air column.
If a drum is beaten hard, its loudness ................
Match the following
| column A | column B |
| (A) Amplitude | (1) frequency |
| (B) Frequency | (2) amplitude |
| (C) Loudness | (3)maximum displacement on either side |
| (D) Pitch | (4) presence of other frequencies |
| (E) Waveform | (5) 1/ time period |
Name three characteristics of a musical sound.
Two waves have frequencies 256 Hz and 512 Hz, but same amplitude. Compare their (i) loudness, and (ii) pitch
The frequency of the stretched string of a fixed length is f when it is plucked in the middle. Where should it be plucked so that string vibrates with frequency (i) 2f, (ii) 3f?
Draw diagrams to show these vibrations and name them.
Give a scientific reason.
We can hear the movement of a mosquito’s wings but we cannot hear the movement of our hands.
Give scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
