Loudness and Amplitude
Physics ⇒ Waves and Sound
Loudness and Amplitude starts at 7 and continues till grade 12.
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See sample questions for grade 10
A person moves away from a sound source. What happens to the loudness of the sound they hear?
A sound wave has an amplitude of 0.02 m. If the amplitude is increased to 0.04 m, by what factor does the loudness increase?
A sound wave has an amplitude of 3 units. If its amplitude is increased to 6 units, by what factor does its loudness change?
A sound wave has an amplitude of 5 units and a frequency of 500 Hz. If the amplitude is reduced to 2.5 units, what happens to the loudness?
A person moves away from a sound source. What happens to the loudness of the sound they hear?
A sound wave has an amplitude of 0.02 m. If the amplitude is increased to 0.04 m, by what factor does the loudness increase?
A sound wave has an amplitude of 5 units and a frequency of 500 Hz. If the amplitude is reduced to 2.5 units, what happens to the loudness?
Two students are listening to the same sound source. Student A is standing in air, while Student B is underwater at the same distance from the source. Assuming the amplitude of the sound wave is the same in both media, which student perceives the sound as louder? Explain your answer.
Which instrument is used to measure the intensity or loudness of sound? (1) Thermometer (2) Barometer (3) Sound level meter (4) Voltmeter
Which of the following best describes amplitude? (1) The number of waves passing a point per second (2) The maximum displacement from the rest position (3) The distance between two crests (4) The speed of the wave
Which of the following is the softest sound? (1) 10 dB (2) 30 dB (3) 50 dB (4) 70 dB
Which of the following statements is correct? (1) Amplitude affects pitch, not loudness. (2) Amplitude affects loudness, not pitch. (3) Amplitude affects both pitch and loudness. (4) Amplitude affects neither pitch nor loudness.
Fill in the blank: The ________ of a sound wave determines how loud or soft the sound is perceived.
Fill in the blank: The amplitude of a sound wave is measured in ________.
Fill in the blank: The greater the amplitude of a sound wave, the ________ the sound.
Fill in the blank: The subjective perception of the intensity of a sound is called ________.
Is it possible for two sounds to have the same loudness but different amplitudes?
True or False: Loudness is a subjective property and can vary from person to person.
True or False: The amplitude of a sound wave can be negative.
True or False: The decibel scale is a logarithmic scale used to measure loudness.
