SLR13.2 | Representing Sound

What is sound?

• A type of electromagnetic wave

• A form of energy that travels through air as vibrations

• A type of light wave

• A form of static electricity

How is sound represented on a computer?

• As a series of light pulses

• As a sequence of binary numbers

• As a continuous wave

• As a series of electrical charges

What is the sampling rate?

• The number of bits used to represent each sample

• The number of samples taken per second

• The number of channels in an audio file

• The duration of the audio file

What is sampling resolution?

• The number of samples taken per second

• The number of bits used to represent each sample

• The frequency of the sound wave

• The length of the audio file

How do you calculate the size of a sound file?

• Sampling rate × Sampling resolution × Duration

• Sampling rate + Sampling resolution + Duration

• Sampling rate × Duration

• Sampling resolution × Duration

What is the effect of increasing the sampling rate?

• Decreases the file size

• Increases the file size and improves sound quality

• Decreases the sound quality

• Has no effect on sound quality

What is the effect of increasing the sampling resolution?

• Decreases the file size

• Increases the file size and improves sound quality

• Decreases the sound quality

• Has no effect on sound quality

What is bit depth in digital audio?

• The number of channels in an audio file

• The number of bits used to represent each sample

• The frequency of the sound wave

• The duration of the audio file

If a sound file has a sampling rate of 44,100 Hz and a bit depth of 16 bits, what is the bit rate?

• 44,100 bits per second

• 16 bits per second

• 705,600 bits per second

• 88,200 bits per second

What unit is used to measure sampling rate?

• Hertz (Hz)

• Bits

• Decibels (dB)

• Metres per second (m/s)