1.2 Text, Images and Sound L3

Multiple Choice

What is real life sound known as?

• Analogue Sound
• Digital Sound

Multiple Choice

Computer can convert sound into binary

• Yes

• No

Multiple Choice

Sound is stored in computer as analog wave.

• Yes

• No

Multiple Choice

____________ is used to convert the analogue wave to digital sound

• Analogue-to-Digital Convertor

• Digital to Analogue Convertor

• Analogue Wave Convertor

Multiple Choice

Increasing the amount of bits available for each sample has what effect on the file size?

• Increases

• Nothing

• Decreases

Multiple Choice

Increasing the sample rate has what effect on the file size?

• Increases

• Nothing

• Decreases

Multiple Choice

Increasing the sample rate has what effect on the quality?

• Increases

• Nothing

• Decreases

Multiple Choice

A sample is

• The tempo of the sound wave

• A measure of the amplitude at that moment

• The amount of bits needed to store the sound wave

• The information needed to reconstruct the sound wave

Multiple Choice

What sample rate is the standard?

• 22 kHz

• 32 kHz

• 44.1 kHz

• 86 kHz

Multiple Choice

What sample rate is the standard?

• 22 kHz

• 32 kHz

• 44.1 kHz

• 86 kHz

Multiple Choice

State the measurement used for the sample rate of an audio file.

• Hertz (Hz)

• Seconds (s)

• Minutes (m)

• Bytes (b)

Multiple Choice

Label the y axis of this analogue sound wave.

• Amplitude

• Frequency

• Duration (Time)

• Volume

• Pitch

Multiple Choice

Label the x axis of this analogue sound wave.

• Amplitude

• Frequency

• Duration (Time)

• Volume

• Pitch

Multiple Choice

Define what is meant by "sampling rate", when converting an analogue sound into digital.

• How many samples of the sound is taken per second.

• How many samples of the sound is taken per minute.

• It is the gap between each of the points where the analogue sound is sampled.

• It is the number of bits used for each sample.

Multiple Choice

Define what is meant by "sample size", when converting an analogue sound into digital.

• How many samples of the sound is taken per second.

• How many samples of the sound is taken per minute.

• It is the gap between each of the points where the analogue sound is sampled.

• It is the number of bits used for each sample.

Multiple Choice

Describe how an analogue sound is converted into digital form.

• Samples of the amplitude are taken at regular intervals. Each sample is stored as a binary number to form an approximated sound.

• Samples of the wavelength is measured for the whole recording. This measurement is stored as binary numbers to form an approximated sound.

Multiple Choice

With a sound wave, the higher the amplitude...

• The louder the sound.

• The quieter the sound.

• The higher the pitch.

• The lower the pitch.

Multiple Choice

With a sound wave, the shorter the amplitude...

• The louder the sound.

• The quieter the sound.

• The higher the pitch.

• The lower the pitch.