GCSE: Sound (part 2)

What unit is sample rate measured in?

• Bits per second (bps)

• Hertz (Hz)

• Megabits per second (Mbps)

• Decibels (dB)

Which of the following is true if you increase the sample rate? (more than one should be selected)

• Better quality of recording

• Needs greater storage space

• Larger file size

• Decrease in quality

What sample rate is used for CD quality sound?

• 44,100 Hz

• 88,200 Hz

• 22,100 Hz

What is a sampling rate?

• The number of samples taken per second

• The number of bits per second needed to store sound

• The number of different volume levels per second

• The highest frequency in the sound file

The higher the resolution, the ____ the file size.

• Smaller
• Larger

Define the term 'bit rate'.

• Snapshots of sound are taken as the wave cannot be represented as a series of continuous changes

• The number of samples taken each second

• The number of bits used per second of audio

• The number of bits available to record each sample

Define the term 'bit depth'.

• Snapshots of sound are taken as the wave cannot be represented as a series of continuous changes.

• The number of samples taken each second

• The number of bits used per second of audio

• The number of bits available to record each sample

What affects the quality of an audio clip?

• Its amplitude

• The number of pixels in the sound

• Its sample rate

Which of these are used to calculate the size of a sound file

• Sample rate x sample resolution x length in seconds

• Sample rate x sample resolution x length in minutes

• Sample rate x bit depth x length in minutes

• Sample resolution x length

The resolution of a sound file is the same as...

• its bit depth

• its bit rate

• its highest frequency

• its sample rate