Project Description

Office Room Acoustics

Room acoustic of office design mainly includes sound insulation design and privacy.  But for open-style office, the emphasis of the acoustic design should focus on communication. Keep words heard the confidentiality, including the reasonable allocation of work area, partition and ceiling sound insulation design and control of reverberation time.
Permitted Noise Level in Room
Room TypeAllow the Noise Level(A Sound Level dB)
First Class Office BuildingSecond Class Office BuildingThird Class Office Building
Office≤45≤50≤55
Design Drawing Room≤45≤50≤50
Meeting Room≤40≤45≤50
Multi-Function Room≤45≤50≤50
office wall ceiling acoustic
Office, Meeting Room Allow Noise Level
Room NameAllow Noise Level(A Sound Level dB)
High Demand StandardLow Limit Standard
Single Office≤35≤40
Many People Office≤40≤45
Videophone Meeting Room≤35≤40
Standard Meeting Room≤40≤45
Office, Meeting Room at the Top of the Floor of the Loud Noise Standard
Component Name Impact Sound Single Value Evaluation(dB)
High Demand StandardLow Limit Standard
Weighting normalization sound pressure level Ln,w(Experimental measurement)Weighting normalization sound pressure level LnT,w(field measurement)Weighting normalization sound pressure level Ln,w(Experimental measurement)Weighting normalization sound pressure level LnT,w(field measurement)
Office, Meeting Room at the Top of the Floor<65≤65<75≤75
The Height of the Meeting Room at about 4 m:
When the meeting room area is less than 200 square meters, T=0.3-0.5s
When the meeting room area in 200-500 square meters, T=0.5-0.8s
When the meeting room area in more than 500 square meters, T=0.8-1.0s
Meeting Room in 500 hz – 1000 hz reverberation time
Room NameRoom Cubage(m3Reverberation Time(s)
Videophone Meeting Room≤200≤0.6
Common Meeting Room≤200≤0.8