Architectural Acoustics: Introduction Flashcards
art and technique of designing spaces, structures and mechanical systems to meet hearing needs
architectural acoustics
The architect must deal primarily with the external
human senses of: _, _, _
senses of sight, touch and hearing
The goal of architectural acoustics is to make the
environment best serve the functions intended, such as (3)
work, relaxation and sleep
4 Essential Elements of Architectural Acoustics
room acoustics, sound reinforcement system, sound isolation, mechanical system noise control
6 compatibility w/ room acoustics shapes
rectangle, cruciform, diamond, square, fan, octagon
is the act of blocking noise through the use of physical barriers.
noise isolation
it’s a process for blocking off ambient sound through a system of components
noise cancellation
is an oscillation in
presence of the atmosphere
which is capable of being
detected by the human ear
sound
It is a form of energy propagated in waves that continues to subsist until filtered through a material turning into heat by friction.
sound
is the sensation produced
through the ear resulting from fluctuations in the pressure of the air.
sound
elements of the nature of sound (3)
source of sound, medium or transmission path, and receiver
is
normally a vibrating body,
which converts some
other form of energy into
vibration. The source can
be made quitter.
source of sound
often used as a generic
term for devices used in
converting some form of
energy into sound such
as loudspeakers and
microphones.
transducer
is any
substance that allows the
vibration to be transmitted
in the form of a wave
motion. The transmission
can be made to transmit
more or less sound.
transmission path
Sounds that are
transmitted by air are
called
airborne sounds
Sounds that are
transmitted through solid
bodies are called
structureborne sounds
pertains with
the human ear; and can be influenced
receiver
3 types of sound
music, speech, noise
are classified as ordered sound
music & speech
classified as disordered sound
noise
sound waves can be
pure tone or complex sound
is sound
dominated by energy in a
single frequency
pure tone
pure tone is
described by a single
smooth
sine curve
can only be
produced electronically
pure tone
are
those of speech,
music and noise
complex sound
Sounds with wavelengths ranging from ___to ___can be heard by humans.
12mm-15000mm
the full circuit by
the particle.
cycle
the number
of complete cycles per
second, measured in
hertz (Hz).
frequency
the
maximum displacement
of a particle.
amplitude
the time required
for one complete
vibration, measured in
seconds per cycle.
period
the
distance a sound wave
travels during one cycle
of vibration.
wavelength
6 properties of sound
1.Speed or Velocity
2. Frequency (Pitch or
Tone)
3. Power (Intensity or
Loudness)
4. Threshold of Audibility
5. Threshold of pain
6. Directionality of Sound
Sources
is the speed of
sound that varies greatly
according to the medium
the waves travel in and
slightly according to the
temperature of the
medium.
velocity
Sound travels in the air at
___meters per second
at normal temperature
(___degrees Centigrade)
330, 20
In sound, ___is
often referred to by a
term borrowed from
musical concepts – Pitch.
frequency,
The sound’s frequency is
its number of vibration in
cycles per second, also
known as ___
hertz (hz)
The approximate
frequency range of a
healthy person’s is __to
___Hz.
20-20000hz
Humans are most
sensitive to sounds
having significant energy
in the ___to ___Hz.
500-4000 hz
Low frequency sounds of
about 16 to 500 Hz are
called ___
rumble
while high
frequency sounds of
1,000 to 8,000 Hz are
referred to as ___
hissy
fomula for wavelength
w= v/f
also known
as sound intensity, is its
loudness or impact of its
pulsating waves against
eardrums
sound power level
sound power level is measured in?
decibels (db)
