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Flashcards in Sound & Hearing Deck (14):
1

Amplitude

The Volume of a Sound Wave

2

What do we measure sound in and what is the scale called?

We measure sound in dB (decibels) and we use the dBA scale.

3

What does SPL stand for and what does it refer to?

Sound pressure level - the amount of physical air movement

4

What does the dBVU scale stand for?

Decibels in volumetric units.

5

What does SNR stand for and what does it refer to?

Signal to noise ratio is the ratio between the amplitude of the recorded signal and the average amplitude of the noise in the system.

6

What is a waveform?

A waveform is a graphical representation of a recorded signal.

7

What are the fundamental characteristics of a waveform?

Amplitude
Frequency
Velocity
Wavelength
Phase
Harmonic Content
Envelope

8

What two aspects can we visually identify from a waveform?

Volume - the distance of the waveform from the centre line

Length - the time of the waveform

9

What is frequency measure in?

Hz (Hertz)

10

What two things is frequency used to describe?

The pitch of a sound
The number of cycles per second

11

If a waveform doubles in the number of cycles per second how does the pitch change?

The pitch increases by an octave

12

What will an EQ system do?

Increase or decrease the amount of frequencies in a sound.

13

What four key areas is an EQ system divided into?

Low frequencies
Low mids
High mids
High frequencies

14

What does EQ create in the mix?

Definition
Clarity
Separation