c7 3.2 Sound - GCSE Quiz

What does analogue mean?

• An old technology.
• Information as 1s and 0s.
• Information as continuous waves.
• Information with breaks in it.

What is an Analog to Digital Converter?

• The process for turning digital data to analogue data.
• The process for turning analogue data to digital data.
• A device for turning analogue data to digital data.
• A device for turning digital data to analogue data.

What is a sample rate? Select two answers that apply.

• The number of bits per sample.
• A process measured in Hertz.
• The length of the sample to be measured.
• The number of samples per second.
• The process of rounding a sample to a whole number.

What is a bit depth?

• The number of bits per sample.
• A process measured in Hertz.
• The length of the sample to be measured.
• The number of samples per second.
• The process of rounding a sample to a whole number.

What is a sample duration?

• The number of bits per sample.
• A process measured in Hertz.
• The length of the sample to be measured.
• The number of samples per second.
• The process of rounding a sample to a whole number.

For the process of analogue to digital conversion, what order would these steps be done in... 1) The recording is converted into an analogue electrical signal. 2) The amplitude is measured at regular intervals. 3) The sound is recorded by a microphone. 4) These samples are stored as binary numbers. 5) The samples are quantised.

• 3,1,2,5,4
• 3,1,4,5,2
• 1,3,2,5,4
• 3,1,6,5,4

A common sampling rate for digital music is 44.1 kHz. How many samples per second is this?

• 44.1
• 4410
• 44100
• 441000

You are recording a sound file for 10 seconds using a sampling rate of 44.1kHz and a bit rate of 16-bits. What will the file size be? Give your answer to 2 decimal places.

• 861.33b
• 861.33kb
• 861.33mb
• 861.33gb

You are recording a sound file for 2 minutes using a sampling rate of 1kHz and a bit rate of 8-bits. What will the file size be in kb? Give your answer to 2 decimal places.

(a)