Loudness and Pitch

Q.

How is pitch related to frequency ?

Q.

How much distance can a person hear sound?

Q.

What is the loudness of a normal conversation in decibels?

Q.

At a time when it is cloudy, there may be frequent thunder and lightning. You hear the sound of thunder after observing the lightning stroke. Can you answer why this happens? Measure this time interval using a time watch. Calculate the distance of the nearest point of lightning ( speed of sound in air = 346 ms^-1)

Q.

On what factor does the pitch of a sound depend?

Q.

Name the unit used to measure the loudness of sound. Also write its symbol.

Q.

Abstract Noun for Deep

Q.

Before playing the orchestra in a musical concert, a sitarist tries to adjust the tension and pluck the string suitably. By doing so, he is adjusting

1. the intensity of sound only

2. the amplitude of sound only

3. frequency of the sitar string with the frequency of other musical instruments

4. loudness of sound

Q.

Which produces sound of a higher pitch : a drum or a whistle ?

Q.

How does loudness depend on the amplitude of vibrations ?

Q. Name the three types of musical instruments. How is sound produced in each type?

Q.

(a) What is meant by the (a) 'pitch' of sound, and (b) 'quality' of sound?

(b) What is ultrasound? State two uses of ultrasound.

Q.

Name the characteristic of sound which enables us to distinguish between a man's voice and a woman's voice even without seeing them.

Q. When we increase loudness of a sound, which of the following characteristics of the wave increases?

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

Q.

Name the characteristic of sound related to its frequency.

Q.

Name the characteristic of sound which depends on : (a) amplitude (b) frequency.

Q.

The frequency of a sound wave is determined by its loudness.

1. True
2. False

Q.

Sound travels in the form of longitudinal waves.

1. True
2. False

Q.

Two waves of the same pitch have amplitudes in the ratio 1 : 3. what will be the ratio of their

(i) loudness,

(ii) pitch ?

Q.

What is the frequency? Give the mathematical relation between frequency and time period.

Q. If the loudness of sound exceeds, it can cause harm to the human ear.

1. $50\text{dB}$
2. $75\text{dB}$
3. $80\text{dB}$

Q.

Name the unit in which the loudness of sound is expressed.

Q.

Which Is The Vibrating Part Of Harmonium?

Q.

The pitch of a shrill sound is more than that of a flat sound.

1. True
2. False

Q.

Name the factor that determines the loudness of the sound heard.

Q.

Does frequency change in damped oscillations ?

Q.

In a transverse wave, the particles of medium oscillate:

1. In the direction of wave

2. perpendicular to the direction of propagation of wave.

3. In the opposite direction of wave

4. None of the above.

Q.

Fill a glass bottle with some water. Blow across the mouth of bottle and listen to the sound. Change the level of the water in the bottle. Does the pitch of the sound change?

Please explain the relation between the amount of water in the glass and the pitch of the sound produced on blowing over the glass with diagram and a short video also. Thank you.

Q.

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 ?

Q.

Which of the following is the unit of frequency?

1. Hertz

2. Second

3. Decibel

4. Metre