Coursework Brief 2013
It is proposed to use a Victorian Chapel as a performance space for un amplified music and talks. The chapel is located in the centre of Bristol away from any main roads but surrounded by residential buildings. A sketch plan of the chapel is given below together with other available data from some initial acoustic tests within the chapel.
Write a short report covering the following:
1. The issues that you think may be important in respect of noise problems that may affect its use as planned and outline possible solutions.
2. A specification of suitable acoustic design criteria for the hall.
3. Predictions of the reverberation time when the hall is in use.
4. Design of sound absorption needed to achieve suitable reverberation times for both of the planned uses given above.
Data
Reverberation times in octave bands measured with the empty hall, calculated from 12 decays in each band.
63Hz 3.5 sec
125Hz 2.5 sec
250Hz 2.6 sec
500Hz 2.5 sec
1000Hz 2.6 sec
2000Hz 2.3 sec
4000Hz 2.1 sec
8000Hz 1.8 sec
Plan
Width = 20m.
Length = 50m.
Average height = 8m.
Total internal surface area = 3120m2
Plastered masonry walls with original stained glass windows (32m2 on each of the longer sides), plaster ceiling, bare wood floor, wooden bench type seating.
Seating capacity (limited due to fire regulations) is 350 people
External doors open directly to outside
Residential properties are located within 40m of the chapel
State all assumptions made and reference all data used.