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Sound by Mind Map: Sound

1. Instruments

1.1. 1.stringed instruments - violin 2.percussion instruments - tabla 3.wind instruments - flute

2. Characteristccs

2.1. 1. sound is form of energy 2.produced by a vibrating object 3. needs medium to propogate

3. Types of sound

3.1. ultrasonic sound - (+ 20,000hz) infrasonic sound -(- 20hz) audible sonud - (20 to 20,000hz)

4. Organs involved in sound production

4.1. eardrum , windpipe, layrnx,inner ear, middle ear & outer ear.

5. Noise pollution

5.1. causes : 1.honking 2.telivision 3.sound producing gadgets measures : 1.silent devices 2.planting trees

6. Quality of sound

6.1. 1.pitch - depends on frequency 2. loudness - depends on amplitude

7. Terms related to sound waves

7.1. 1.Amplitude 2.Time period 3.Frequency

8. Disturbance

8.1. Non periodic - Noise periodic - Music