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WorksheetsData Representation - Sound
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Digital sound always sounds better than analogue.
a)
False
b)
True
2.
The most common sampling rate for sound files is 16 bit.
a)
False
b)
True
3.
The most common sampling rate for sound files is 44.1 khz.
a)
True
b)
False
4.
A microphone converts the changes in air pressure into voltage changes which are then digitised.
a)
True
b)
False
5.
The following is true about sampling rates:
a)
They measure a number of snapshots of sound taken per second.
b)
They are not as important as bit rates.
c)
They are different for every song, depending on its loudness.
6.
Sampling rate for CDs is different from the one used by DVDs.
a)
True
b)
False
7.
DAC does this:
a)
Converts a binary stored version of a recording to voltage changes that speakers can reproduce.
b)
Takes voltage changes and digitises them for further processing and storage.
c)
Amplifies the sound and makes it digitally clean.
8.
Identify a false statement:
a)
Higher bit rates usually improve the sound quality and result in smaller file size.
b)
Higher bit rates usually improve the sound quality but result in larger file size.
c)
To record a sound into binary format, ADC will be applied rather than DAC.
9.
Which of the following is not a usual way of reducing sound file size:
a)
Erasing metadata and keeping recordings short.
b)
Using lossy compression.
c)
Using lossless compression.
d)
Reducing sampling rate or bit rate.
10.
Lossy compression works by identifying sound frequencies that are not obvious and deleting them.
a)
True
b)
False
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