Question

What are the characteristic of sound? ​

Answer 1

Answer:

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Sound :

Sound is defined as a form of energy which produces sensation of hearing.Sound is produced when an object vibrates.

Characteristics of Sound :

Loudness :

It is determined by amplitude of the sound waves i.e greater the amplitude louder the sound and lesser the amplitude softer the sound.

Pitch :

It is defined as how brain interprets the frequency of the sound wave. Greater the frequency means high pitched sound , lesser the frequency means low pitched sound.

Quality of Sound :

It is the characteristic of sound which enables us to distinguish one sound from the other even if they have same frequency and loudness.

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Answer 2

Answer:

Characteristics Of Sound:-

1) Amplitude

2) Time Period

3) Frequency

4) Wavelength

5) Speed

Explanation:

1.Amplitude:

If we pull the bob sideways and leave it, it will oscillate back and forth for some time and then come to a stop. The position where it comes to a stop is called the mean position (position A in figure). The maximum displacement of the bob from the mean position during oscillation is called the amplitude of the oscillation. In figure, the maximum displacement occurs when the bob is at positions B and C.

2.Time period:

When the bob moves from one position and comes back to the same position (moving in the same direction), it is said to complete one oscillation. For example, in figure, if the bob starts from A, goes to C, then to B, and then back to A, we say one oscillation is complete (look at the arrows in figure). The time taken to complete one oscillation is called the time period of the oscillation. It is measured in seconds.

3.Frequency:

The number of oscillations per second is called the frequency of oscillation. For example, if the bob of the pendulum in figure moves five times through point B in a second, its frequency is 5 per second. The SI unit of frequency ‘per second’ is called hertz (Hz) in honour of the German physicist, Heinrich R. Hertz. When we say that a vibrating body has a time period t, we mean that it completes one oscillation in t seconds. Thus, in 1 second it will complete 1/t oscillations, which is its frequency.

4.Wavelength:

Forms of electromagnetic radiation like radio waves, light waves or infrared (heat) waves make characteristic patterns as they travel through space. Each wave has a certain shape and length. The distance between peaks (high points) is called wavelength.

5.Speed:

The speed of sound is defined as the dynamic propagation of sound waves. This depends on the characteristics of the medium through which the propagation takes place. Speed of sound is used for describing the speed of sound waves in an elastic medium.