give three Characteristics of sound that propagate.
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Answers
Hey mate here is ur answer
Sound - sound is a form of energy which enable us to hear by producing a sensation of hearing in our ears .
Here characterstics of sound .
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Sound have four characterstics
1 Loudness
2 pitch
3 Quality
4 Timber .
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Characteristics of Sound
The sound that we hear around us is the type of energy made by the vibration that travels through the air or any other medium and can be heard when it reaches a person’s ear. So, basically sound helps us to communicate with the other person. For example, we can hear the musical instruments like tabla, flute, a guitar due to vibration. The characteristics of sound are as follows:
Pitch
Loudness
Quality
Vibrating Parts of Musical Instruments
Veena – Stretched string
Tabla – Stretched membrane
Drum – Stretched membrane
Shehnai – Air Column
Flute – Air Column
Pitch
Pitch is a characteristic of sound by which a correct note can be distinguished from a grave or a flat note. We can identify a female and male voice without seeing them. The term ‘pitch’ is often used in music. Pitch depends upon the frequencies of the sound wave. A note has a higher pitch when the frequency is high and a note of low frequency has a low pitch. For example, when a small baby speaks something, his/her voice has a higher frequency so in case of a baby the pitch is higher than the pitch of a man. The sound with a high frequency is called as shrill.
Loudness
The loudness is a sensation of how strong a sound wave is at a place. It is always a relative term and is a dimensionless quantity. Loudness is measured in decibel (dB). It is given as:
L = log(I), here ‘I’ is the intensity.
The loudness depends on the amplitude of the vibration. It will be louder when the amplitude is high. Suppose when we pluck a string of the sitar it starts vibrating with low amplitude and if we apply more energy by plucking more strongly, the string will vibrate with the greater amplitude and produce a loud sound. As the amplitude of vibration increases, sound also increases.
Quality
The word timbre also describes the term quality. As different sources produce different sounds, the timbre helps us to distinguish between them. A sound of good quality is pleasant to listen. The instruments are of different shapes and size and they produce different harmonics of loudness hence their sound can be easily distinguished.