Peter Ibbotson

Marshall Day Acoustics

Marshall Day Acoustics is one of the worlds leading acoustic consultancies. Spanning six countries, we have nearly 100 staff across fifteen offices, making us one of the largest independent acoustic consultancies. Our independence is our strength, by not being governed by shareholders or large companies we are able to focus on quality of design. This has enabled us to work on world-class projects with renowned architects. Sir Harold Marshall and Christopher Day established Marshall Day Acoustics some 40 years ago. Emeritus Professor Marshall is renowned for discovering the last significant room acoustic parameter, that is the importance of lateral reflections within performance space design. Marshall Day's technical resources are world-class having published over twenty technical papers and developed software, such as Insul and Zorba, which are used in acoustic constancies around the world.