Edexcel A-Level Music Technology The principles of sound overview quiz quiz

Frequency

Wavelength

Amplitude

Period

$2.5$ ms

$25$ ms

$0.4$ ms

$4.0$ ms

$2:1$

$3:2$

$4:3$

$5:4$

$10\log_{10}\left(\frac{V_2}{V_1}\right)$

$20\log_{10}\left(\frac{V_2}{V_1}\right)$

$\log_{10}\left(\frac{V_2}{V_1}\right)$

$\frac{V_2}{V_1}$

$+1$ dB

$+6$ dB

$+3$ dB

$+10$ dB

Complete silence, the very quietest signal a digital system can store

A doubling of the perceived loudness compared with the original signal

The noise floor, the quietest level sitting just above the system noise

The maximum level before clipping

All harmonics (odd and even)

Only the fundamental frequency with none of the higher harmonics present at all

Only the odd-numbered harmonics, just as a square wave does, with the even ones absent

No harmonics whatsoever above the fundamental, giving a pure and dull tone

Its fundamental frequency alone, which fixes the pitch we hear

The relative levels of its harmonics

Its amplitude, which is the size of the pressure change in the wave

Its period, the time taken to complete one full cycle of the wave

$10$ kHz

$20$ kHz

$40$ kHz

$80$ kHz

The highest frequency that can be captured by the recording system

The tempo of the recorded music, measured in beats per minute

The stereo width and the sense of space across the left and right channels

The dynamic range (and lower quantisation noise)

They fold back as false lower frequencies (aliasing)

They are captured perfectly and reproduced exactly as they were in the original signal

They are simply made silent and removed without affecting the rest of the recording

They automatically raise the bit depth of the recording to make room for them

$0.5$ m

$2.0$ m

$0.5$ kHz

$510$ m