Page 3 - Competency Based Worksheet-Sound

DATA-BASED QUESTIONS
12. Use the table below to answer the questions:
Frequency Amplitude Wavelength Pitch
Instrument Timbre
Range Range Range Range
Low to Bright, Mellow,
Piano 27.5–4186 Hz 60–70 dB 4.1m–0.27m
High Rich
Mid to Smooth, Warm,
Violin 196–3520 Hz 75–85 dB 1.7m–0.09m
High Expressive
Mid to Bright, Bold,
Trumpet 130–1568 Hz 80–90 dB 2.6m–0.22m
High Piercing
Punchy,
Low to
Drum Set 40–2000 Hz 80–100 dB 8.6m–0.17m Resonant,
Mid
Dynamic
Mid to Clear, Delicate,
Flute 262–2349 Hz 65–75 dB 1.3m–0.14m
High Ethereal
a) Which instrument has the widest pitch range?
b) Which instrument produces the sound with the shortest wavelength?
c) Describe the timbre of the trumpet.
d) Is the flute's frequency range infrasonic, audible, or ultrasonic?

13. A sound experiment was conducted with the following data:

Sound Source Frequency (Hz) Perceived Shrillness
Bird Chirp 4500 High
Guitar String 330 Low
Human Voice 1000 Medium
Whistle 7000 Very High
a) Which sound source has the highest frequency? How does its shrillness
compare to others?
b) Which source has the lowest shrillness? State its frequency.
c) If the bird chirp frequency increases to 6000 Hz, what would be the effect on its
shrillness?

NUMERICAL-BASED QUESTIONS
14. A sound is produced due to 100 vibrations in 5 seconds. Find the time
period and frequency of the sound wave.

15. a) A sound wave has a frequency of 250 Hz. What is the time period of the wave?
b) A sound wave has a time period of 0.02 seconds. What is its frequency?
c) A sound wave has a time period of 0.01 seconds. What is its frequency?