Pitch and Frequency
Physics ⇒ Waves and Sound
Pitch and Frequency starts at 7 and continues till grade 12.
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See sample questions for grade 11
A siren emits a sound at 1000 Hz. If the siren moves towards a stationary observer, what happens to the pitch heard by the observer?
A sound wave has a frequency of 500 Hz. If the speed of sound in air is 340 m/s, what is its wavelength?
A sound wave has a period of 0.002 seconds. What is its frequency?
A sound wave in water has a frequency of 1000 Hz and a speed of 1500 m/s. Calculate its wavelength.
A tuning fork produces a sound of 256 Hz. What will happen to the pitch if a tuning fork of 512 Hz is used instead?
Describe how the pitch of a sound changes if the frequency is halved.
Describe what is meant by the term 'ultrasonic'.
A siren emits a sound at 1000 Hz. If the siren moves towards a stationary observer, what happens to the pitch heard by the observer?
Which of the following animals can hear ultrasonic frequencies above 20,000 Hz?
(1) Humans
(2) Dogs
(3) Elephants
(4) Whales
Which of the following best describes the relationship between frequency and pitch?
(1) Directly proportional
(2) Inversely proportional
(3) No relationship
(4) Exponentially related
Which of the following frequencies is most likely to be perceived as a high-pitched sound?
(1) 50 Hz
(2) 500 Hz
(3) 5000 Hz
(4) 50,000 Hz
Which of the following is NOT a factor that affects the frequency of a vibrating string?
(1) Length of the string
(2) Tension in the string
(3) Thickness of the string
(4) Color of the string
Fill in the blank: As the frequency of a sound wave increases, its pitch becomes ________.
Fill in the blank: The ________ effect explains the change in pitch of a sound due to the relative motion between the source and the observer.
Fill in the blank: The pitch of a sound is a ________ property, while frequency is a ________ property.
The frequency range of human hearing is approximately ________ Hz to ________ Hz.
A sound wave has a frequency of 15 Hz. Is this sound audible to humans?
A sound wave has a frequency of 20,000 Hz. Is this sound audible to the average human ear?
True or False: The frequency of a sound wave is independent of the medium through which it travels.
True or False: The pitch of a sound depends on its amplitude.
