Lesson 2 - Sound

What does an Analogue to Digital Converter (ADC) do?

• Converts analogue sound to digital
• Converts digital sound to analogue
• Adjusts sound frequency
• Removes noise from a sound file

What is the sample rate measured in?

• Bits
• Bytes
• Hertz (Hz)
• Kilobytes

What happens to the file size when both the sample rate and resolution increase?

• It decreases
• It stays the same
• It increases
• It depends on the format

How does lossy compression affect sound quality?

• Improves it
• Reduces it slightly
• Doesn't change it
• Converts it to higher frequencies

What is the formula for calculating the size of an uncompressed sound file?

• Sample rate + resolution x duration
• Sample rate x resolution x duration
• (Sample rate x resolution) / duration
• Sample rate / resolution x duration

How is the sound quality of a digital sound recording improved?

• By increasing the sample rate
• By decreasing the sample rate
• By using less memory
• By using lossy compression

What is the range of human hearing in hertz (Hz)?

• 20-200 Hz
• 100-5000 Hz
• 20-20000 Hz
• 200-20000 Hz

Which file type is a lossy compressed audio format?

• WAV
• MP3
• FLAC
• AIFF

Which factor most affects the accuracy of a digital sound recording?

• Sample duration
• Sample resolution
• Sample color
• Sample format

What is the benefit of using lossless compression for audio files?

• Reduces file size without losing quality
• Increases file quality but increases size
• Reduces file size by removing data
• Removes background noise