1.2 sound

What is sampling?

• The process that converts analogue sound into discrete digital data.

• The process to take samples of a sound signal to check its quality.

• The process that converts digital data into analogue sound.

What is analogue sound?

• A sound signal after sampling.

• A continuously varying signal.

• A sound signal with different pitches.

• A signal that can take only certain values.

Why are sound signals sampled?

• To play sound via speakers or headphones.

• To analyse sound quality

• To compress sound files

• To store in a computer

Which of the following is TRUE about sampling?

• The shape of digital sound is quite similar to analogue sound but the curves are not smooth.

• Digital sound is of higher quality when compared to analogue sound.

• A listener feels that a digital sound is very different from its analogue signal.

• All of the above

Which of the following affects the digital sound quality?

• Sampling rate

• Bit depth

• Bit rate

• All of the above

Which of the following is TRUE about sampling rate?

• Sampling rate is the number of samples taken in a minute.

• The higher the sampling rate, the more the sound quality.

• The lesser the sampling rate, the more similar is the discrete form to the analogue form.

• All of the above

What is the unit for sampling rate?

• Samples/ second

• Hertz (Hz)

• kilohertz (kHz)

• All of the above

What is bit depth?

• Number of bits available for each sample

• Number of bits of data used to store data sampled every second.

• Number of samples in a second.

Which of the following is uncompressed file formats?

• MP3

• WAV

• Ogg Vorbis

• All of the above

What is bit rate?

• Number of bits available for each sample

• Number of bits of data used to store data sampled every second.

• Number of samples in a second.