Zoe Razavi presenting her paper on the requirement of the acoustical engineering discipline in building design.

The NDY Global Acoustic Group has recently showcased its capabilities with attendance and participation at the 176th Meeting of the Acoustical Society of America and the Canadian Acoustic Association in Victoria Canada, the 2018annual conference of the Australian Acoustical Society held in Adelaide, Australia and the Acoustical Society of New Zealand’s biennial conference held in Auckland, New Zealand.

Zoe Razavi, Acoustics Manager at the NDY Vancouver office, presented her paper on the importance of recognising acoustics in building design. Zoe highlighted that, even when human-centric design principles are being considered, acoustic quality could be overlooked. Zoe has also presented an argument that a more aggressive approach, such as mandating acoustic compliance certificates and/or regulation enforcement, is required to drive the industry into recognising the importance of acoustics in building design.

The NDYs Acoustic Groups architectural acoustics capability, particularly with regards to lightweight structural systems, is important given Cross Laminated Timber (CLT) is a modern building material which is gaining increasing application internationally on various developments. Its use as a structural wall and/or floor element has certain advantages over traditional concrete or steel structures, particularly relating to the speed with which it can be constructed on-site. Papers addressing the global acoustic teams experience and capability with Cross Laminated Timber (CLT) were presented in both Adelaide, Australia and Auckland New Zealand.

Zoe Razavi presenting her paper on the requirement of the acoustical engineering discipline in building design.

Melbourne based Senior Acoustic Engineer Cameron Walbran presented a paper outlining the floor airborne and impact sound insulation performance of CLT in comparison to traditional timber joist and concrete floor systems.

On-site results that the Global Acoustic Group had carried out on two similar CLT apartment buildings were presented and comparted to test results from other apartment buildings that consisted of a mixture of concrete floors and timber joists. The low frequency performance of the floor system, an area where complaints regarding impact insulation performance is typical, was compared with various flooring upgrades applied.

Tim Beresford, Auckland based Senior Associate – Acoustic Manager and Acoustical Society of New Zealand (ASNZ) vice-president, presented his paper outlining the effects of acoustic flanking degradations on apartment floors with exposed cross laminated timber walls at the recent ASNZ conference, highlighting that flanking via the exposed CLT produces only a small degradation in the floor airborne sound and impact performance, provided structural-acoustic details are carefully considered.

The raw wood look of CLT is often considered attractive by designers, and it may be desired to leave it exposed as the finished wall, floor or ceiling material.

Tim Beresford presenting his paper addressing onsite test results of CLT and flaking degradation

The attendance and participation of our acoustic engineers at these notable conferences highlights the groups expertise, industry reputation and global outreach. NDY is proud of all the individuals that that have presented, participated and assisted in the preparation of these topics, directly or indirectly.

The topics presented represent a very small component of the groups extensive capability across a wide range of acoustic subdisciplines.

If you are interested in learning more about these topics or the groups wider capabilities, please contact the individuals directly or Arif Zaher, NDYs Global Acoustic Group Leader, on a.zaher@ndy.com.

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