Rainbow mind map-SOUND -2
● Production Of Sound:
- The sound is produced by vibrating objects. NO vibration NO sound.
- They travel from one place to another in the form of waves.
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● Sound as longitudinal wave:
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- Longitudinal waves – In this type of wave, the movement of the particle are parallel to the motion of the energy i.e. the displacement of the medium is in the same direction to which the wave is moving. Example – Sound Wave
Longitudinal wave comprises Compression and rarefraction
● Terms related wave:
Amplitude (A): The amplitude of a wave is the maximum displacement of any particle of the medium from its mean position.
Time Period (T): Time Period (T) of a wave is the time taken by any particle of the medium to complete one vibration .
Wavelength (λ): Wavelength (λ) - It is equal to the distance travelled by the wave by its time period (T).
Frequency (f): It is the number of vibrations made per second by any particles of the medium
f = 1/T
● Characteristics of Sound:
● Relation between Amplitude and Loudness:
Loudness is directly proportional to square of Amplitude . Amplitude increases two times loudness will increase 4 times
.● Relation between Frequency and Pitch:
Frequency increases by 2 times, Pitch will be also doubled
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● Factors affecting Pitch of musical instruments:
