MODULE 1 (Introduction to Sound and
Room Acoustics)
1) Introduction to Sound: Origin and
nature of sound, its characteristics and
measurement
Amplitude, frequency, period, wavelength,
Course: Building Services IV velocity of sound, sound pressure, sound
(Acoustics And Noise Control) intensity, Decibel scale,
Sound and distance inverse square law.
human hearing, auditory range for
humans (Frequency and Intensity
Course Code: 18ARC 7.3 threshold of audibility and pain), pitch
(association with frequency), tone,
loudness (association with amplitude and
Faculty: Shanthala V, intensity), Phon.
Associate Professor, BMSCA
2) Room Acoustics: Reflection - Nature of
reflection from plane, convex and concave
surfaces,
Diffraction, Absorption, Echoes, focusing
of sound, dead spots, flutter echo. Room
resonances,
Reverberation - of RT on speech and
music.
, Module-1
Arrive at
appropriate
acoustic
strategies
Architectural
Acoustics and Understand
Noise control nature of
Sound
Room
Acoustics
Understand
the
implication Objectively
on human assess
environment sound
Building Services IV (Acoustics And Noise Control); 18ARC 7.3
Faculty: Shanthala V, BMSCA
, Module-1
What is sound?
• It is a pressure variation in air
• Sound is a vibration in an elastic Undisturbed
medium- air, water, building air
materials etc.,
• It is a series of compressions and Vibratory
Source
rarefactions due to air particles
set in motion by the vibrating
source Compression
Rarefaction
Regions of compressions and rarefactions.
Building Services IV (Acoustics And Noise Control); 18ARC 7.3
Faculty: Shanthala V, BMSCA
, Module-1
Properties of Sound
• Requires a medium to be
transmitted
• Transmitted through longitudinal
waves- because the particles
vibrate in the same direction as
the propagation of the wave
• Pressure Wave
• In air sound spreads equally in all
Longitudinal Wave
directions and it is affected by
objects in the path of transmission
Building Services IV (Acoustics And Noise Control); 18ARC 7.3
Faculty: Shanthala V, BMSCA
Room Acoustics)
1) Introduction to Sound: Origin and
nature of sound, its characteristics and
measurement
Amplitude, frequency, period, wavelength,
Course: Building Services IV velocity of sound, sound pressure, sound
(Acoustics And Noise Control) intensity, Decibel scale,
Sound and distance inverse square law.
human hearing, auditory range for
humans (Frequency and Intensity
Course Code: 18ARC 7.3 threshold of audibility and pain), pitch
(association with frequency), tone,
loudness (association with amplitude and
Faculty: Shanthala V, intensity), Phon.
Associate Professor, BMSCA
2) Room Acoustics: Reflection - Nature of
reflection from plane, convex and concave
surfaces,
Diffraction, Absorption, Echoes, focusing
of sound, dead spots, flutter echo. Room
resonances,
Reverberation - of RT on speech and
music.
, Module-1
Arrive at
appropriate
acoustic
strategies
Architectural
Acoustics and Understand
Noise control nature of
Sound
Room
Acoustics
Understand
the
implication Objectively
on human assess
environment sound
Building Services IV (Acoustics And Noise Control); 18ARC 7.3
Faculty: Shanthala V, BMSCA
, Module-1
What is sound?
• It is a pressure variation in air
• Sound is a vibration in an elastic Undisturbed
medium- air, water, building air
materials etc.,
• It is a series of compressions and Vibratory
Source
rarefactions due to air particles
set in motion by the vibrating
source Compression
Rarefaction
Regions of compressions and rarefactions.
Building Services IV (Acoustics And Noise Control); 18ARC 7.3
Faculty: Shanthala V, BMSCA
, Module-1
Properties of Sound
• Requires a medium to be
transmitted
• Transmitted through longitudinal
waves- because the particles
vibrate in the same direction as
the propagation of the wave
• Pressure Wave
• In air sound spreads equally in all
Longitudinal Wave
directions and it is affected by
objects in the path of transmission
Building Services IV (Acoustics And Noise Control); 18ARC 7.3
Faculty: Shanthala V, BMSCA
