Ch 11

Question 1

Sound

Answer 1

Sound is produced by vibration
It is a form of energy that travels from one place to another

Question 2

Tuning fork

Answer 2

It’s is a laboratory instrument which is used to produce particular sound consisting of two prongs and the lower part is called stem

Question 3

Stethoscope

Answer 3

Operates on the transmission of sound from the chest piece via air filled hollow tubes to listener ear chest piece consists of a diaphragm sound vibrates the diaphragm creating acoustic pressure waves which after multiple reflection travel up to the tube

Question 4

Loudness

Answer 4

Characteristic of sound which distinguish bet loud and faint sounds
Amplitude
Area
Distance

Question 5

Pitch

Answer 5

Shrill and grave sound can be distinguished
Frequency

Question 6

Quality

Answer 6

Two sound sounds of same loudness and pitch

Question 7

Resonance

Answer 7

Thin walled glass goblets can vibrate when hit by sound waves

Question 8

Intensity

Answer 8

Sound energy passing per second through a unit area
held perpendicular to the direction of propagation of sound waves
Wm-²

Question 9

Decibel scale

Answer 9

Is a logarithmic measure of the amplitude of sound waves equal intervals correspond to multiplying by 10 instead of adding equal amounts

Question 10

Reflection of sound

Answer 10

When sound is incident on the surface of medium it bounces back into first medium

Question 11

Oscilloscope

Answer 11

By oscilloscope you can see sound waves

Question 12

Acoustics

Answer 12

The technique or method to absorb undesirable sound by porous or soft material

Question 13

Reverberation

Answer 13

Multiple reflections

Question 14

Audible frequency

Answer 14

Range which a human ear can hear

Question 15

Ultrasound

Answer 15

Frequency higher than 20000 Hz which are inaudible to human ear