J277 1.2.4 Data storage L04

What unit is sample rate measured in?

• Bits per second (bps)

• Hertz (Hz)

• Megabits per second (Mbps)

Which of the following is not true if you increase the sample rate?

• Better quality of recording

• Needs greater storage space

• larger file size

• Decrease in quality

What is meant by bit depth?

• The number of samples taken per second

• The amplitude of each sample
  

• The number of bits used per second of audio

• The number of bits used to store each sound sample

What is measured when the wave is sampled?

• Amplitude

• Hertz

• Bit rate

• Frequency

What sample rate is used for CD quality sound?

• 44,100 Hz

• 88,200 Hz

• 22,100 Hz

The purpose of a Digital to Analogue converter is to…

• Convert binary data into analogue form so we can hear it via a speaker

• Convert sound waves into binary so it can be understood by a computer

What piece of hardware would you use to input sound into a computer?

• Speaker

• Analogue to digital converter
  

• Microphone

• Digital to analogue converter

If you increase the bit depth of an audio file, you increase the quality.

• True

• False

The amplitude of a sound wave is…

• How high the wave is from the crest or trough

• The frequency at which it is sampled

• The speed at which it travels through air