COLLEGE OF ENGINEERING AND TECHNOLOGY DEPARTMENT OF ARCHITECTURE INDIVID

ACOUSTICS

1. COLLEGE OF ENGINEERING AND TECHNOLOGY
DEPARTMENT OF ARCHITECTURE
ARCHITECTURAL SCIENCE IV ( ACOUSTICS )
INSTRUCTOR
MR. TEGBARU
GROUP 1
ANDUALEM DAMTEW
BINIYAM NEGASH
ELIYAS KHALIWE
MERON ABIY
NUREDIN HASSEN
TAMIRAT TEKATAMIRAT TEKA
YARED ADDISU

2. GROUP 1
LTH 130 is one of lecture class in wolkite
university where lessons happen.
Seleted class neighbourhood;
-North: FBE library
-South: Parking
-East: Student dormitory
- -West: Social & Humanity College
-NW: LTH 129 & class room

STUDENT DORMITORY
FBE LIBRARY
TECHNO CLASS ROOM
FOOD ENGINEERING COLLEGE
STUDENT DORMITORY
SOCIAL & HUMANITY COLLEGE
PARKING
STUDENT DORMITORY
LOCATION MAP
LTH 130

3. GROUP 1
Car & Students Pass through
FBI Library
Lecture class
Students Pass through
Student Lounge
Foot ball playing
SOUND ANALYSIS

4. GROUP 1
ELEVATIONS

5. GROUP 1
FLOOR PLAN SECTION

6. CEILING
FLOOR
WALL
GROUP 1
mono pitch scessor steel roofsuspended chip
Galvanised roof loud banging during rain or hailstorms, expansion and contraction
sounds in extreme temperature changes, or even creaking noises due to wind.
STEEL
Steel has a sound absorption coefficient of only 0.03, which means that it can only
absorb about 3% of all sound waves that hit it. Therefore, it reflects the other 97%!
Chip board has an absorption coefficient of about 0.30 on the low end of the Chip board has an absorption coefficient of about 0.30 on the low end of the
frequency range, but only .09 on the higher end. So it reflects between 70 and 91%
of sound waves.
Rough concrete can absorb up to 7% of high-frequency sounds in the 4,000 Hertz
range and 4% in the 2,000 Hertz range. But smooth concrete is even more
reflective, and a layer of paint or glaze can bring those numbers down to 1–2%.
painted wall had a STC of 56
PLASTER
It haighly reflect sound. absorb between 5 and 10% of frequencies performing better
on the lower end of the spectrum.improve the absorbency of masonry walls, but not by
much.
HCB
PLASTER
PAINT
floor concrete plaster
selected materialsteel bars
ABSORPTION COEFFICIENTS
MATERIALS 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz
Painted HCB wall 0.1 0.05 0.06 0.07 0.09 0.08
chip board 0.24 0.19 0.14 0.08 0.13 0.1
People-adults 0.25 0.35 0.42 0.46 0.5 0.5
(per 1/10 person)
The truss steel frame is connected by welding.
The mono pitch with the ceiling tiles is connected by screw.
The roof with the galvanized roof metal is connected with
screw and bolts.

7. GROUP 1