Loudness and Amplitude

Physics ⇒ Waves and Sound

Loudness and Amplitude starts at 7 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Loudness and Amplitude. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 9

A sound has an intensity of 10^-6 W/m². If the reference intensity is 10^-12 W/m², what is the sound level in decibels?

A sound wave has an amplitude of 0.01 m. What is its amplitude in millimeters?

A sound wave has an amplitude of 0.02 m. If the amplitude is increased to 0.04 m, by what factor does the energy increase?

A sound wave has an amplitude of 2 units. If another sound wave has an amplitude of 4 units, how does its loudness compare?

A sound wave has an amplitude of 3 units. If the amplitude is reduced to 1 unit, how does the loudness change?

A sound wave has an amplitude of 5 mm. What is its amplitude in meters?

A factory produces a constant sound with an intensity of 2 × 10^-5 W/m². If the reference intensity is 1 × 10^-12 W/m², calculate the sound level in decibels (dB).

A student is listening to music at a concert. The sound level is measured at 90 dB. If the sound intensity decreases by a factor of 100, what will be the new sound level in decibels?

Which of the following best describes amplitude? (1) The number of waves 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 best describes loudness? (1) Objective and measurable (2) Subjective and depends on the listener (3) Always the same for everyone (4) Unrelated to amplitude

Which of the following best explains why a drum sounds louder when hit harder? (1) The frequency increases (2) The amplitude increases (3) The wavelength increases (4) The speed increases

Which of the following factors does NOT affect the loudness of a sound? (1) Amplitude (2) Frequency (3) Distance from source (4) Sensitivity of the ear

Fill in the blank: The ________ of a sound wave determines how loud or soft the sound is perceived.

Fill in the blank: The ________ the amplitude, the softer the sound.

Fill in the blank: The amplitude of a sound wave is the ________ distance from the rest position to the crest or trough.

Fill in the blank: The amplitude of a wave is measured from the ________ position to the maximum displacement.

True or False: A sound with a larger amplitude will always be perceived as louder than a sound with a smaller amplitude, assuming all other factors are the same.

True or False: Amplitude and loudness are the same thing.

True or False: Increasing the amplitude of a sound wave increases its frequency.

True or False: Loudness is directly proportional to the amplitude of a sound wave.