Sound

Question 1

Frequency

Answer 1

Frequency of vibration is the number of cycles occurring per second

Question 2

Amplitude

Answer 2

The maximum displacement of any molecule from its rest position

Question 3

Overtones

Answer 3

Multiples of the fundamental frequency

Question 4

Characteristics

Answer 4

Loudness = Amplitude, Quality = Number of Overtones, Pitch = Frequency

Question 5

Frequency limits of Audibility

Answer 5

The highest and lowest frequencies that can be heard by the human ear (20Hz - 20kHz)

Question 6

Resonance

Answer 6

Transfer of energy between two bodies with the same natural frequencies

Question 7

Sound Intensity

Answer 7

The rate at which sound energy is passing through unit area at right angles to the direction in which the sound is travelling at that point

Question 8

Threshold of Hearing

Answer 8

The smallest sound intensity detectable by the average human ear at a frequency of 1kHz

Question 9

Fundamental Frequency of a String

Answer 9

A string vibrating with an anti node at its centre and a node at each end is vibrating at its fundamental frequency