Acoustics Flashcards
A branch of physics that studies sound, namely mechanical waves in gases, liquids and solids
Acoustics
The Father of Modern Architectural Acoustics
Wallace Clement Sabine
A physical phenomenon that stimulates the sense of hearing
Sound
It is considered the most obvious conveyor of information whether cognitive or affective
Speech Sound
A sound signal that contains no information at all making it unwanted or undesired
Noise
Attribute of auditory sensation in terms of which sound may be ordered on a scale related primarily to frequency
Pitch
It is the unit of pitch
Mel
An observer’s auditory impression of the strength of a sound
Loudness
Measured by the sound pressure level of a standard pure tone of specified frequency
Loudness Level
The unit of loudness level
Phon
The unit of loudness on a scale designed to give scale numbers approximately proportional to the loudness
Sone
Formula relation of Sone and Phon
Phon = 40 + 10 log₂ (sone)
The characteristic tonal quality of sound
Timbre
A sound in which sound pressure varies sinusoidally with time
Pure Tone
The speed of sound
Tempo
It relates to a sonic time pattern, maybe simple, complex, constant or changing
Rhythm
The way a sound begins
ATTTTTAAACK!
Refers to how long a sound blasts
Duration
Refers to how fast a sound fades from certain loudness
Decay
Sound waves that are periodic disturbance of the medium through which they travel
Longitudinal Waves
Light or Radio waves in which the medium is displaced perpendicular to the direction of travel
Transverse Waves
The maximum displacement involved in the vibration
Amplitude of the wave
Sounds with frequencies lower than that audible
Subsonic or infrasonic
Sounds whose frequencies lie within the audio spectrum
Sonic sounds
A velocity greater than sound velocity
Supersonic
Human hearing range
20 Hz to 20 kHz approximately 10 octave bands
Octaves of Bass, Midrange and Treble
Bass = 1st to 4th octave band Midrange = 5th to 8th octave band Treble = 9th to 10th octave band
The maximum intelligibility for voice frequency
1000 to 3000 Hz
The maximum voice energy
250 to 500 Hz
