Sound Storage - Year 9

How is an analogue sound wave converted into a binary sample?

• By measuring the wave's frequency

• By converting the wave's speed into binary

• By recording the wave's temperature

• By measuring and recording the amplitude at specific intervals

What is a sample rate?

• The number of times per second the amplitude of the sound wave is measured

• The speed at which a sound wave travels

• The number of bits used to store one second of sound

• The duration of the sound recording

What happens to an audio file if the sample rate is increased?

• Shortens the duration of the audio

• Reduces the audio quality

• Improves the audio quality

• Decreases the file size

What is bit depth?

• The duration of the sound recording

• The number of samples taken per second

• The speed at which a sound wave travels

• The number of bits available to represent each sample

How does increasing the bit depth affect an audio file?

• Shortens the duration of the audio

• Reduces the file size

• Decreases the audio quality

• Increases the audio quality

What is the file size in bytes of an audio sample with a bit depth of 8, a sample rate of 10, and a duration of 12 seconds?

• 1200 bytes

• 9600 bytes

• 960 bytes

• 120 bytes

What does a higher sample rate result in?

• A lower-quality sound

• A smaller file size

• A higher-quality sound

• A faster playback speed

Why does a higher bit depth result in a larger file size?

• Because it reduces the number of samples needed

• Because each sample stores additional bits

• Because it increases the playback speed

• Because it decreases the sample rate

What is the effect of a low sample rate on sound quality?

• It results in a high-quality sound

• It results in a low-quality sound

• It improves the sound quality

• It has no effect on sound quality

How is the file size of a sound file calculated?

• Sample rate x bit depth

• Sample rate + bit depth

• Sample rate x bit depth x duration

• Sample rate / bit depth