J277 Data Representation 2.4: Sound

What is sound primarily perceived as in human physiology?

• A form of energy

• A type of light wave

• A wave of pressure

• A chemical reaction

What device is used to detect sound waves?

• Thermometer

• Microphone

• Accelerometer

• Barometer

What is the primary function of analogue-to-digital conversion in sound processing?

• To broadcast the sound

• To amplify the sound

• To compress the sound file

• To convert the sound wave into a digital format

What does the sample rate measure?

• The loudness of the sound

• The frequency of sampling the sound per second

• The duration of the sound

• The intensity of the sound

At what sample rate is a music CD typically sampled?

• 44,100 Hz

• 96,000 Hz

• 48,000 Hz

• 22,050 Hz

What impact does increasing the sample rate have on a sound file?

• Reduces the quality of the sound

• No impact on the file size

• Increases the file size

• Decreases the file size

What does the term 'bandwidth' refer to in the context of sound files?

• The total data transfer rate

• The total range of volume levels

• The total range of numbers used in bit depth

• The total range of frequencies in the sound

What is the typical bit depth used in CD quality audio?

• 8 bits

• 24 bits

• 32 bits

• 16 bits

What does a higher bit depth indicate in terms of sound quality?

• Higher quality and larger file size

• Higher quality and smaller file size

• Lower quality and smaller file size

• Lower quality and larger file size

How is the total size of a sound file calculated?

• Sample rate - Bit depth - Duration

• Sample rate / Bit depth / Duration

• Sample rate x Bit depth x Duration

• Sample rate + Bit depth + Duration