PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoIf we play two different musical instruments at the same time, the vibrations produced by the musical instruments travel through the same air medium, but we hear different sounds.
A sound has three characteristics. They are
- Loudness
- Pitch or shrillness
- Quality
Loudness:
- The loudness of a sound is determined by its amplitude.
- The amplitude of the sound wave depends upon the force with which an object is made to vibrate.
- If we strike any object lightly, we hear a soft sound because we produce a sound wave of less energy or less amplitude.
- Similarly, if we strike any object strongly, we hear a loud sound because we produce a sound wave of high energy or high amplitude.
Example:
If we strike a bass drum with a stick, the amplitude of the wave is high, so the sound is loud.
Pitch or shrillness:
- The frequency of a sound determines its pitch or shrillness.
- Objects of various sizes produce sounds of various pitches vibrating at different frequencies.
- The higher the frequency and the higher the pitch of the source, the faster it vibrates. As a result, a high pitch sound corresponds to a greater number of compressions and rarefactions per unit time.
- A sound with a higher pitch is very easy to hear, whereas a sound with a lower pitch is difficult to hear.
Example:
If we blow a whistle, the frequency of the wave is high, so the pitch is high. Therefore, the sound of a whistle is very clear.
Whistle
Variation of amplitude and pitch
Quality of sound:
- Sound quality (timbre) is a feature of a sound that allows us to distinguish one sound from another with the same pitch and loudness.
- The quality of sound depends on the shape of the sound wave.
- The pleasant sound is said to be a sound of rich quality.
- A sound of a single frequency is called a tone.
- The sound produced by a mixture of several frequencies is referred to as a note, and it is enjoyable to listen to.
- The sound which is unpleasant to hear is called noise.
- The sound which is pleasant to hear is called music.
Reference:
https://pxhere.com/en/photo/612959
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