Acoustics Midterm Flashcards
(33 cards)
sound power
ability of a sound source to emit/generate acoustic energy/ vibrate the medium
sound power units:
watts
desirable sound coefficient for an acoustic absorbent material
0.90
sound level units:
decibels
three appropriate uses of absorbent material
to reduce overall reverberant sound energy
on parallel walls to reduce flutter
on rear wall to diminish echo
reverberation
prolonging of sound in space after the source has stopped due to repeated diffuse reflections from the boundaries of the space
Wallace Clement Sabine developed his reverberation time metric after conducting a series of experiments to correct the acoustics of the _______
Fogg Art Museum Lecture Hall
which acoustical quality best characterizes a gothic cathedral?
reverberance
Shape of Walt Disney Hall
Vineyard/ Surround floor plan
architectural design strategies to achieve reverberance
reverberations chambers
shoebox shape
sound reflecting materials
adequate large room volume
sound intensity
(power per unit area OR energy per unit time) through a unit area
sound pressure
pressure fluctuations at a given point away from the source
RC
Room criteria
NC
noise criteria
NR
noise rating
PNC
preferred noise criteria
threshold of hearing to painful
0-130 dB
sound intensity units
watts/meters^2
sound intensity units
watts/meters^2
Subjective: reverberance
Objective measure:
Early Decay Time EDT
Reverberation Time RT
Subjective measure: Loudness
Objective measure: strength
Subjective measure: clarity
objective measure: clarity
hall considered a flop
(New York) Philharmonic Hall
Room Criteria (RC) is best for
best for determining ‘very’ low frequency noise (ie. HVAC systems)
