Slide show

PJ LIVE ARTS PJ Live Art Centre is a mixed used theater located at a commercial hub in Jaya One. It is the Selangor’s first independent theatre facility dedicated to present the best of the qualities and function in family and comedy program.

Also, it is an organisation best known as the catalyst for community outreach and support , utilising arts as a platform of funding for the charities and education ; promote the community involvement in its theatre and audience development.

CAPACITY : 450 PEOPLE

AUDITORIUM DESIGN ANALYSIS

I. Shape and Massing a) b) â—? â—?

Rectilinear with several angular and parallel walls at the sides.

Poor acoustical design.

Contribute to the issue of flutter echoes.

Can be tackled when parallelism is being avoided.

II. Arrangement of Seats a) b) ● ● ●

140-degree sound projection angle from the center of the sound source on the stage.

Arranged in a fan shaped configuration.

Maximum number of seats.

Obtain an optimum view of the stage area.

Achieve the most effective acoustic quality as sound waves travel in a spherical order.

III. Leveling of Seats a) b) â—?

Seats on each row are installed higher than the seats of the row before.

Ensures that sound waves projected from the stage do not face obstructions.

Audiences at the back are able to hear as clear as the ones at the front.

IV. Ceiling Reflectors and Absorbers a)

b)

Absorber is used to eliminate the sound reflection to improve the speech intelligibility.

Reflectors are used to reflect the sound waves toward the audience (esp at the back and the balcony)

MATERIALS

I. Walls a) ● ● ● b) ● ●

Plasterboards with cellular core Plasterboards reflect and forming echoes Air pockets absorb sound wave Parallelism is avoided Concrete wall Reduce the transmission of sound Low frequency sounds

I. Walls a) ● ● ● b) ● ●

Fabric acoustic panel With Melamine based foam Absorb the medium to high frequencies Sound wave dissipated through the porous membrane before being trapped and dampened Rockwool Sound barrier prevents a second wave

II. Floor a) ● b) ● ● ●

Veneer Laminate Flooring Reduce the hollow percussive sound Plywood Providing airborne sound insulation Adding a feeling of solidity to the floor For the stage, aluminium galvanized steel posts were added underneath the timber bearers.

III. Ceiling a) ● ● b) ● ●

Perforated plywood panels Absorbing unwanted sound and echo Fragmenting standing waves Reflector Ceiling Increases the sound level for listeners at the focus Reduce the reverberant sound levels

SOUND SOURCE

Speakers PJ Live Arts uses the 5.1 surround sound system. On the right is the layout of the system in the auditorium and the system is shown below.

Each black square depicts a speaker. The centre speaker in the top line of the square is used for dialogue. The left and right speakers on either side of the centre speaker are used to create stereo sound for music and other sound effects in the film. The left and right rear speakers create the surround sound effect.

Type of Speakers

VRX932 LAP Loudspeaker System

EON 206P P.A. System

VRX915S Bass Reflex Subwoofer

NOISE SOURCE

External Sources

Jaya One being a commercial hub for small and large retail stores attracts a steady flow of patrons.

Located away from the main road, the most prominent noise comes from chatter from the bars and restaurants near the auditorium.

Internal Sources a)

Ceiling Lights Ceiling lights produce a constant dim static noise at roughly 10dB or below.

b)

Air Conditioning Vents Air diffuser sound ratings have a 10dB room effect.

c)

Usage of Walkway Thudding of footsteps from audience.

d)

Backstage Noise of backstage doors opening and closing, Walking up the steel staircase, props moving.

SOUND PROPAGATION & PHENOMENON

I. Sound Shadow a) b)

The deep balcony as a potential acoustic shadow area.

Application of absorption wall possibly reflect to lose the energy , received low intensity of those reflected sound towards the area below forming a sound shadow area.

Sound Concentration a)

Sound intensity levels at the concentrate zone, which located at centre of auditorium, has the highest intensity level.

b) Sound concentration zone has been formed because of the rectangular shape of the auditorium. c) Which the form is only well suited for lecture, film or speech type theatre.

II. Sound Reflection a) b)

c)

Sound is effectively reflected back to the audience by the ceiling reflector.

Flutter echoes are produced due to the reflective material of the auditorium flooring.

The floors should be covered with absorbent materials to minimize the reflection of sound.

Echo [(8.0+7.9)-7.7]/0.34 =26.47ms

III. Echo and Sound Delay a) b)

Sound delay presents in PJ Live Arts is very minimal.

This theater will not suffer from any intelligible sound caused by echoes.

Echo [(11.4+8.1)-12.9]/0.34 =19.41ms

Echo [(15.1+2.8)-15.5]/0.34 =7.06ms 26.47ms, 19.41ms and 7.06ms of sound delay is acceptable for a performance theater.

DISCUSSION

I. Discussion a) b) c) â—? â—?

Reverberation Time = 1.08s Recommended range is 1.00s - 1.25s Recommendation Addition of timber acoustic panel as reflector.

Application of pile carpet as floor finishing.

THANK YOU