Understanding Sound Representation in Computing

What does the frequency of a sound wave determine?

• The loudness of the sound

• The pitch of the sound

• The duration of the sound

• The colour of the sound

Which unit is used to measure the frequency of a sound wave?

• Decibels (dB)

• Metres (m)

• Hertz (Hz)

• Seconds (s)

What does amplitude represent in a sound wave?

• The speed of the sound

• The pitch of the sound

• The loudness of the sound

• The length of the sound wave

What is the process of converting an analogue sound signal into a digital signal called?

• Amplification

• Digitisation

• Modulation

• Transmission

Which of the following best describes sample rate?

• The number of bits used to store each sample

• The number of samples taken per second

• The total length of the recording

• The maximum amplitude of the sound

What is the typical unit for sample rate?

• Decibels (dB)

• Hertz (Hz)

• Metres per second (m/s)

• Kilograms (kg)

If a sound is sampled at 44,100 Hz, how many samples are taken each second?

• 4,410

• 44,100

• 441,000

• 441

What happens to the quality of a digital sound recording if the sample rate is increased?

• The quality decreases

• The quality stays the same

• The quality increases

• The sound becomes quieter

If the amplitude of a sound wave is increased, what effect does this have on the sound?

• It becomes higher in pitch

• It becomes louder

• It becomes quieter

• It becomes shorter in duration

Which of the following best describes an analogue signal?

• A signal that has only two possible values

• A signal that varies continuously

• A signal that is always at maximum amplitude

• A signal that is silent