Acoustics

ἀκουστικός (akoustikos): "of or for hearing, ready to hear"

ANSI/ASA S1.1-2013

(a) Science of sound, including its production, transmission, and effects, including biological and psychological effects

(b) Those qualities of a room that, together, determine its character with respect to auditory effects.

Vibrations

Sound waves

Frequency

Hertz = Hz

Phase

Complex waves

Beating waves

Glicol

Time vs frequency domain

Fourier transform

Sound pressure level

decibel = dB

Inverse-square-law

3dB rule

Perceived as twice as loud

Speed of sound

Air

343 m/s

Water

1481 m/s

Iron

5120 m/s

Room size and shape

Modes

Standing waves

Online calculator

Flutter echo

Materials

Sound alterations

Reflection

Diffraction

Diffusion

Absorption

Reverberation

T60

Frequency range

Organology

Microphones

Dynamic

Condenser

Contact

Speakers

Loudspeakers

Headphones

Actuators

Digitization

ADC

DAC

Sampling rate

Sampling theorem

Nyquist frequency

Bit rate

Containers

Compression

Window size