P1 Revision - U1T5-7Sound,Image,Compression

What piece of hardware is used to sample a sound wave?

• Digital-analogue converter

• Wave synthesizer

• Microphone

• Analogue-digital converter

What does the bit rate of a sampled sound refer to?

• The number of bits used for 1 second of audio

• The number of bits used for every sample

• The final file size of the sampled sound

• The speed at which the sampled sound is played back

One factor that affects the quality of digital audio is the bit depth. What does this refer to?

• The number of bits used to store each sample

• The overall size of the sampled sound

• The number of bits needed for 1 second of audio

• The number of samples taken every second

Which of these are factors in determining the amount of storage needed for a digitally sampled sound? (select all that apply)

• The number of samples taken per second

• The bit depth per sample

• The length of the sampled sound

• The range of wave frequencies present in the sound

• The type of audio sampled (voice, music, etc)

Which of these are factors in determining the quality of a sampled sound? (select all that apply)

• The number of samples taken per second

• The number of bits used to store each sample

• The length of the sampled sound in seconds

• The range of wave frequencies present in the sound

Which of these variables affect the file size of a sampled sound? (select all that apply)

• the bit depth

• the sampling frequency

• the bit rate

• the length of the sampled sound

• the type of sound (speech, music etc)

Choose the correct descriptions

• Analogue Signals

• Digital Signals

• Continuously Signals

• Discrete Signals

Choose the correct descriptions

• Analogue Signals

• Digital Signals

• Continuous Signals

• Discrete Signals

Match the following

• number of bits used per second

• Hertz

• the unit of the sample rate

• Sample Resolution/Bit Depth

• number of samples taken per second

• Sample Rate

• number of bits per sample

• Bit Rate

• = sample rate × resolution × duration

• File Size

The ​ (a)   the ​ (b)   , the ​ (c)   the ​ (d)   .

• higher
• sampling rate or sampling resolution
• greater
• file size
• smaller