Representation of sound

What form must data be in for a computer to be able to process it?

• Binary

• Decimal

• Hexadecimal

• Analogue

Answer explanation

Data must be in binary form for a computer to be able to process it.

What does an analogue to digital converter do?

• Samples a sound wave at regular intervals and converts these to binary

• Makes a sound file smaller

• Assigns binary code to text

• Samples an image so it can be compressed

Answer explanation

An analogue to digital converter samples a sound wave at regular intervals then converts the samples to binary.

............. is the number of sound samples taken per second (measured in Hertz).

• Sample resolution

• Sample rate

............ is taking a measurement at of the amplitude of a sound wave at regular intervals.

• Bit rate

• Sound sampling

• Sample rate

Sample rate (sampling frequency) is measured in ....

• Kilobytes

• Hertz

• Gigabytes

• Picoseconds

Which statement is true?

• Higher sampling rates usually improve the sound quality and result in larger file sizes.

• Higher sampling rates usually do not improve the sound and result in smaller file sizes.

What is the sample rate?

• The number of times a sound wave is sampled per second

• The number of bits used to store each sample

• How loud a sound is

• The size of the sound wave

What is used to convert an analogue sound wave in to a digital format?

• A router

• An amplitude to digital converter

• Analogue to digital converter

Sound waves are analogue.

What does is analogue data like?

• It varies continuously

• It is discrete (separate) values

Computers can only process digital data.

What is digital data like?

• It varies continously

• It is discrete (separate) values