2.6.5 Sound and Compression

How is sound recorded?

• Through a speaker

• Through a microphone

• Through headphones

• Through a device such as a printer

What type of signal is a human sound represented by?

• Digital

• voice over

• Binary

• Analogue

What type of signal must an analogue sound be converted to before being created by a device?

• Binary

• Analogue

• Digital

• Code

How are analogue signals converted to digital signals?

• Analogue to digital converter

• Cash converter

• A convertible

• Using an actuator

A computer will take samples of a sound at regular intervals. This is known as...

• Sample rate

• Bit rate

• Sound files

• Sampling

The gaps in between different samples of sound is known as the...

• Bit interval

• Sample interval

• Sample size

• Bit rate

A sample interval is usually measured in...

• Hours

• Minutes

• Seconds

• Milliseconds

If the sample intervals are short, it would mean...

• The quality will be poor, the file size bigger

• The quality will be better, the file size bigger

• The quality will be better, the file size smaller

• The quality will be worse, the file size smaller

Sample frequency refers to...

• How many bits per inch

• How many pixels per inch

• How many samples taken per second

• How fast the processor actually is

Sample frequency is measured in...

• Hertz

• Hurts

• Bites

• Bytes