04 Sound

What is analogue sound?

• Recording sound as 1s and 0s.

• Recording audio in a format of continuous waves.

What is digital sound?

• Soundwaves travelling through the air.

• Sound represented as binary values.

• Sound represented as denary values.

• Sound that humans emit.

What is sampling?

• The number of bits used to represent a digital sound.

• Turning a microphone on and off to only record sound at certain times.

• Taking measurements of an analogue sound wave at regular intervals.

• Combining two digital sound waves into one.

What is sample rate?

• The number of bits used for a sample

• How many times a sound wave goes up and down.

• How fast a sound wave moves.

• How many samples of a sound wave you take each second.

What is sample rate measured in?

• bits

• Hertz

• Kbps

• Decibels

The number of bits in each sample is known as the sample resolution. What else is sample resolution known as? Select all that apply.

• Bit Rate

• Bit Depth

• Sample Rate

• Amplitude

If the sample rate and sample resolution are increased, what happens to the sound file?

• The quality and the size of the file increase.

• The quality and the size of the file decrease.

• The quality increases and the size of the file decreases.

• The quality decreases and the size of the file increases.

What can create a poor quality sound recording? (Tick all that apply)

• Not enough bits to record the height of the wave accurately.

• Not enough samples taken each second.

• Not enough waves getting to the microphone.

• Not enough seconds in each sample.

What is measured when a sound wave is sampled?

• Amplitude

• Hertz

• Bit rate

• Frequency

If I had a higher sampling rate my piece of audio would take up...

• ...more space.

• ...less space.