Column A Column B (a) Amplitude (i) frequency (b) Frequency (ii) amplitude (c) Loudness (iii) maximum displacement on either side (d) Pitch (iv) presence of other frequencies (e) Waveform (v) 1 t i m e p e r i o d

a). The maximum displacement of a vibrating particle from its rest (or mean) position is called its amplitude. It is expressed in the metre. b). Frequency and time period are interrelated. Frequency is measured in s - 1 . c). The loudness of a sound depends on the amplitude of vibration of the vibrating body producing sound. Greater the amplitude, louder is the sound produced. d). A high pitch sound corresponds to a high-frequency sound wave and a low pitch sound corresponds to a low-frequency sound wave. e). Wave form determines the quality of sound. Wave form comprises many frequencies. Column A Column B (a) Amplitude (iii) maximum displacement on either side (b) Frequency (v) 1 t i m e p e r i o d (c) Loudness (iii) amplitude (d) Pitch (i) frequency (e) Waveform (iv) presence of other frequencies.

EASY

Earn 100

Are tuning forks loud?

Important Questions on Sound

HARD

Science>Physics>Sound>Characteristics of Sound

Two waves have frequencies

256 Hz

and

512 Hz

, but same amplitude. Compare their (i) loudness, and (ii) pitch.

HARD

Science>Physics>Sound>Characteristics of Sound

Column A	Column B
(a) Amplitude	(i) frequency
(b) Frequency	(ii) amplitude
(c) Loudness	(iii) maximum displacement on either side
(d) Pitch	(iv) presence of other frequencies
(e) Waveform	(v) $\frac{1}{t i m e p e r i o d}$

MEDIUM

Science>Physics>Sound>Characteristics of Sound

Draw a diagram to show the wave pattern of high pitch note and a low pitch note, but of the same loudness.

EASY

Science>Physics>Sound>Characteristics of Sound

The frequencies of notes given by flute, guitar and trumpet are respectively

400 Hz

200 Hz

and

500 Hz

. Which one of these has the highest pitch?

MEDIUM

Science>Physics>Sound>Characteristics of Sound

How is the pitch of sound in a guitar changed if (a) thin wire is used, (b) wire under less tension is used?

HARD

Science>Physics>Sound>Characteristics of Sound

Standing at a distance, how is it possible to detect the filling of a bucket under a water tap by hearing the sound standing at a distance ?

MEDIUM

Science>Physics>Sound>Characteristics of Sound

Which characteristics of sound makes it possible to recognise a person by his voice without seeing him?

MEDIUM

Science>Physics>Sound>Characteristics of Sound

A sound wave has a frequency of

4

kHz and a wavelength of

40

cm. The time taken by the sound wave to travel a distance of

3.2

km is_____.

MEDIUM

Science>Physics>Sound>Characteristics of Sound

Two identical guitars are played by two persons to give notes of the same pitch. Will they differ in quality ? Give reason for your answer.

EASY

Science>Physics>Sound>Characteristics of Sound

What determines the pitch of a sound ?

HARD

Science>Physics>Sound>Characteristics of Sound

Two waves of the same pitch have amplitudes in the ratio

1 : 3 .

What will be the ratio of their (i) loudness, (ii) pitch?

MEDIUM

Science>Physics>Sound>Characteristics of Sound

Name the characteristic of the sound affected due to a change in its
(a) amplitude (b) wave form (c) frequency.

MEDIUM

Science>Physics>Sound>Characteristics of Sound

Name and define the characteristic which enables one to distinguish two sounds of same loudness, but of different frequencies, given by the same instrument.

HARD

Science>Physics>Sound>Characteristics of Sound

State the factors that determine
(a) the pitch of a note.
(b) the loudness of the sound heard.
(c) the quality of the note.

EASY

Science>Physics>Sound>Characteristics of Sound

What is the wavelength of a sound whose frequency is