Quality of Sound

Q.

What is meant by the quality (or timbre) of sound ? On what factor does the quality (or timbre) of a sound depend ?

Q. State three characteristics of a musical sound

Q.

What is the difference between Amplitude and Frequency?

Q.

Which characteristic of a sound helps you to identify your friend by his voice while sitting with others in a dark room

Q.

State two conditions necessary for the formation of an echo.

Q.

What is the SI unit of wave number?

1. m

2. m^-1

3. s

4. s^-1

Q. Which of the following characteristics of sound enables us to differentiate between two sounds of the same frequency and amplitude?

1. Pitch
2. Loudness
3. Quality
4. Intensity

Q.

We can distinguish between the musical sounds produced by different singers on the basis of the characteristic of sound called :

(a) frequency

(b) timbre

(c) pitch

(d) loudness

Q.

The _________ of sound is that characteristic which enables us to distinguish one sound from another having the same pitch and loudness.

Q.

Explain:

1)pitch

2)loudness

3)quality of sound

Q. What characteristic makes a particular sound different from another, even when they are having same loudness and pitch?

1. Frequency
2. Timbre
3. Wavelength
4. Velocity

Q. is the most important factor which helps in recognising a person solely by his voice.

1. Loudness
2. Pitch
3. Quality

Q.

Which of the following is not a characteristic of sound?

1. Pitch

2. Loudness

3. None of these

4. Quality

Q.

Name the characteristic of sound which can distinguish between the 'notes' (musical sounds) played the flute and a sitar (both the notes having the same pitch and loudness).

Q.

What is sonic boom? How is it caused? [2 MARKS]

Q.

The sound which is produced due to a mixture of several frequencies is called

1. tone

2. node

3. note

4. noise

Q.

An earthquake produces which kind of sound before the main shock wave begins.

1. Ultrasound

2. Infrasound

3. Audible sound

4. None of the above

Q.

We can hear the sound of the horn of an approaching car before the car reaches, because

1. speed of sound is greater than car's speed

2. high pitch sound of horn

3. low pitch sound of horn

4. It did not face any obstacle

Q.

Radio waves of speed $3.0\times {10}^{8}m{s}^{-1}$reflected off the moon and received back on the earth, the time elapsed between the sending of the signal and receiving it back on the earth’s surface is $2.5s$. What is the distance between moon and the earth?

Q. Why can we not hear echo produced in our classroom?

Q.

An echo is heard after $0.8s$, when a person fires a cracker, $132.8m$ from a high building. Calculate the speed of sound.

Q.

For hearing an echo the minimum distance between the source of sound and the reflecting body should be

1. $12m$

2. $24m$

3. $17m$

4. $51m$

Q.

Which is not the condition for the formation of echoes?

1. The minimum distance between the source of sound and the reflecting body should be $17m$.

2. The temperature of air should be above $20°C$.

3. The wavelength of the sound would be less than the height of the reflecting body.

4. The intensity of the sound should be sufficient so that it could be heard after reflection.

Q. An earthquake generally produces which type of sound wave before the main shock wave begins?

1. Ultrasonic
2. Infrasonic
3. Audible sound
4. Supersonic

Q.

Define the term wavelength in relation to a wave?

Q.

Characteristics of sound which enables us to distinguish between two sound of same loudness and pitch:

1. quality
2. amplitude
3. frequency
4. wavelength

Q.

What is the range of loudness when sound becomes painful?

Q.

A teacher attaches a slinky (a coiled spring ) to the wall and begins introducing pulses with different amplitudes. Which of the following two pulses(A or B) below will travel from the hand to the wall in the least amount of time? Justify your answer.

Q. Sound wave with multiple frequencies is called a tone.

1. False
2. True

Q. Question 5
Which characteristics of the sound helps you to identify your friend by his voice while sitting with others in a dark room?