AS NZS 2107:2016 pdf free

AS NZS 2107:2016 pdf free.Acoustics – Recommended design sound levels and reverberation times for building interiors
The design sound levels given in Table 1 are not necessarily appropriate in all circumstances. In particular, lower sound levels may be appropriate in quiet environments or where expectations of quality are high. For example, lower design sound levels than those given in Table 1 may be preferred for luxury hotels and apartments. However,additional costs will be incurred in achieving sufficient sound attenuation between spaces for acoustic privacy requirements. For each 5 dB reduction in the background sound level,5 dB shall be added to the overall sound isolation performance of the dividing elements to maintain the same level of privacy. There could also be additional costs associated with the provision of quieter building services.
In spaces where acoustic isolation and speech privacy are important and the sound levels are below the lower level of the recommended design range, there is increased risk of inadequate acoustic masking. Where this occurs, loss of acoustic and speech privacy can be a significant concern. In these situations acoustic masking can be introduced into the space to raise the sound level to within the recommended design sound range level in Table 1.
The optimum reverberation time for a particular space is dependent on the room volume.Where the room shape for a particular occupancy or activity is relatively standard, the recommended reverberation times are given in Table 1. These recommended times are for the middle frequencies (arithmetic average of the reverberation times in the octave bands at 500 Hz and 1000 Hz). It is generally considered acceptable in large volumes to have some increase in reverberation time towards the low frequencies. For small volumes, it may be more suitable to have the same reverberation time across the frequency range.
NOTE: Where the room volume for the particular occupancy/activity can vary greatly, reference should be made to Appendix A.AS NZS 2107 pdf free download.