GCSE OCR COMP 1 Understanding Digital Sound Representation

What is sound fundamentally described as in the context of physics?

• A type of electromagnetic wave

• A chemical reaction

• A vibration that travels as a wave of pressure

• A form of light

What is the process called when converting analogue sound waves into digital format?

• Sound wave modulation

• Analogue-to-digital conversion

• Binary transformation

• Digital-to-analogue conversion

Which two main factors determine the quality of a digitally stored sound?

• Wavelength and intensity

• Sample rate and bit depth

• Bit depth and volume

• Frequency and amplitude

What does a higher sample rate indicate about the quality of a sound file?

• Lower quality and smaller file size

• Higher quality and smaller file size

• Higher quality and larger file size

• Lower quality and larger file size

How is the total size of a sound file calculated?

• Sample rate plus bit depth

• Sample rate divided by bit depth

• Sample rate multiplied by bit depth

• Sample rate multiplied by bit depth and duration

What does the term 'bit depth' refer to in digital audio?

• The amplitude of the sound wave

• The frequency of the sound wave

• The number of bits used per sample

• The total duration of the audio file

What impact does increasing the bit depth have on a sound file?

• Decreases the file size

• Increases the file size and quality

• Has no impact on the file

• Decreases the quality

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

• 32 bits

• 24 bits

• 16 bits

• 8 bits

How often is a music CD sampled?

• 44,100 times a second

• 22,050 times a second

• 176,400 times a second

• 88,200 times a second

What does the sample rate measure?

• The intensity of the sound

• The duration of the sound

• The number of samples taken per second

• The depth of each sample