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Acoustical Design of a Conference Hall
RJAV
vol VI issue 2/2009
81
ISSN 1584-7284
Acoustical Design of a Conference Hall
Toma DOINA
Romanian Broadcasting Comp., Technical Departm
ent, Bucharest, ROMANIA,
email toma_doina@yahoo.com
Mih
ă
iescu IOANA
IM Architecture Center, Re
ş
i
ţ
a, ROMANIA, email arh.ioanamihaescu@gmail.com
(Received 18 August 2009; accepted in revised form 28 November 2009)
Abstract:
In the building of Caras Severin County Council from Municipiul Resita, capital of Caras
Severin county, in Romania, was realized an extension and modernization of space located on the first
floor where we arranged a conference hall
with an exhibition space in the foyer.
The beneficiary, Caras Severin County Council wanted
this room to have an enviable architecture and
modern technological equipment for conference an
d teleconference purposes, with facilities for
simultaneous translation in at least two languages.
The room who have to be arranged had
deficiencies between the proportions of geometric dimensions,
placement of large reflecting surfaces
, windows on the corners room,
the poor perfor
mance of sound
insulation panels on the roof, all these negatively impacting the quality sound.
The present paper refers the solutions for acoustical design (sound insulation and perception acoustics) of
a conference hall, adjusted to the aesthetic demands
of the architecture. We will present the acoustic
specifications we would like to achieve for reason
able performances regardin
g the use for the space.
We opted for the acoustic environment of a diffuse field. For this purpose we used moreover for acoustic
treatment the sound absorption material and sound diffuser material.
Concerted efforts of the architect, acoustic specialist a
nd other specialists involved in planning have led to
a conference hall with both architectural and modern
technological equipment,
with good acoustic
qualities, good speech intelligibility even without electronic amplifying the sound.
Keywords:
acoustic design, sound difussors, architecture design



The booth ventilation is a natural one. The air
comes directly from the foyer threw the grid
mounted in the wall booth/foyer. From the foyer the
grid it is not directly visible. The wall with the
ventilation grid is seen from the foyer like big wall
paint made by the local painter Nicolae Vladulescu.
6. CONCLUSIONS
The Hall was a difficult case because of
economical limitations. The Hall was intended to be
a reference for the city and the county.
For financial reasons,
we didn’t make the
measurements in accordance with ISO 3382 to
evaluate the interior acoustical conditions of the
conference hall.
However the subjective impression of most
participants was very positive. The participants have
appreciated the acoustical perception and speech
intelligibility in the room, even without the electro
acoustics system.
Also the sound insulati
on to outdoor noise was
appreciated as good.
Due to economical limitations, there are some
construction elements that have not enough sound
reduction indexes as it was evaluated in the
acoustical project.
But we are in consideration that the background
noise level inside the hall caused by 200 persons
during a conference is bigger than the level from
outdoor noise sources.
Finally the hall was good appreciated for its
modern architectural environment, high technology
equipments and, the least but not the last, good
acoustic conditions.
REFERENCES
[1] Leo L. Beranek,
Acoustics
, McGRAW-HILL BOOK
COMPANY, INC.
[2] ISO 2603 (1998),
Booths for simultaneous interpretation-
General characteristics and equipment
[3] ISO 3382 (2000),
Acoustics-Measurements of the
reverberation time of rooms with reference to other
acoustical parameters
[4] Kutruff H,
Room Acoustics
, ELSEVIER SCIENCE
PUBLISHERS LTD, 1991
[5] Wegener N., Acoustic Project
References in Construction,
Ed. Academiei RPR, 1960
[6] Pup
ă
zan C.,
Acoustic in Construction- Noise Reduction
,
Ed. Academiei RPR, 1970
[7] Izenour G,
Design
, .McGRAW-HILL BOOK COMPANY,