BS8233 section 7: Specific types of building
BS 8233 sections 7.2 to 7.6 gives guidance on acoustic criteria and noise levels appropriate for various types of space. These spaces have different functions; hence, different acoustic criteria and permissible noise levels.
To control internal ambient noise from sources such as traffic and mechanical services, the designer should decide which of the following are appropriate for all or different parts of the proposed building.
Industrial working conditions.
Speech and telephone communications.
Conditions for study and work requiring concentration.
The designer should establish noise activity levels, noise sensitivity and privacy levels for the relevant spaces.
Internal noise insulation
Internal noise insulation is between rooms next to each other, internal to a building. Depending on its use, noise sensitivity or privacy requirements could be a need . For example, a doctors surgery, where the conversations must be confidential.
How we can help you.
We help you sound insulate the room be specifying material and construction of the room. We specify construction of the walls, doors and any cavities through which sound can pass.
We also oversee the construction work and ensure the construction process it completed correctly.
Before we commission the end product, we will perform a noise survey to compare with the 'before' survey. This is proof that the mitigation measures are effective.
Limits for reverberation time
The reverberation time contributes to noise levels within a confined space. An excessively long reverberation time accentuates background noise. Reverberation time also affects the clarity of speech and the warmth of music.
How we help you
We help you by
The improvement of the environment will consider the customer's preferences.
Internal ambient levels for dwellings
For steady external noise sources, it is desirable that the internal ambient noise level does not exceed the guideline values
Activity Location 07:00 to 23:00 23:00 to 07:00
Resting Living room 35 dB LAeq,16hour
Dining Dining room/area 40 dB LAeq,16hour
Sleeping (daytime resting) Bedroom 35 dB LAeq,16hour 30 dB LAeq, 8hour
NOTE: These are recommended levels for overall noise in the design of a building. These are the sum total of structure-borne and airborne noise sources.
Groundborne noise is assessed separately and is not included as part of these targets. Human response to groundborne noise varies with many factors such as level, character, timing, occupant expectation and sensitivity.