Freshly fallen snow is an effective sound dampener. The explanation lies in the structure of the snowflakes. Freshly fallen snow tends to have a soft and loose texture. This characteristic allows the snow to deform under the pressure of sound waves, dissipating energy and reducing the reflection of sound. ”There is nothing in the world […]
absorption
New Ph.D: Acoustic Design with Regard to Human Perception
Friday the 13th of May Emma Arvidsson (EA) did her Ph.D. dissertation at Lund’s University (Sweden) under the title ‘Acoustic Design with Regard to Human Perception’. Acoustic design of Ordinary Public Rooms From many years of research, we know that ordinary public rooms (classrooms and offices) where complex tasks such as learning or following long […]
International & American standards for indoor acoustic comfort
In many circumstances it may be desirable to refer to international or national standards to ensure that exact details of quality, methods, measures etc. is precisely corresponding to a predetermined set of rules and guidelines. There are several standards relating to room acoustics that anybody working in the building industry could utilize for better collaboration […]
Diffusion or absorption?
The Subjective Experience Depending on Type of Acoustic Treatment Recently, PHD student Emma Arvidsson, published an article regarding different acoustic treatments in ordinary rooms and how they are perceived. The article concerns how people subjectively experience different acoustic environments and furthermore, if the experience was different depending on where in the room they were sitting. […]
Acoustic standards in hospitals – overview and thoughts
This is the world – we need acoustic standards! The Danish Cancer Foundation has concluded that traffic noise can lead to breast cancer and non-Hodgkins lymphoma. The Danish Ministry of Environment concludes that 500 Danes die every year because of traffic noise – because of diabetes, stress, and cardiovascular diseases caused by noise. The Danish […]
New experimental methods shed light on sound field diffusion in reverberation chambers.
December 13th 2018 we had the privilege to attend a PhD defense at DTU. The work was done by Mélanie Nolan who for the last 3 years has been working intensely to investigate sound fields in the reverberation chamber. This article is touching upon some of the findings from the research. The influence of absorption […]
Input data – how do we predict room acoustics?
Calculation tools Recently a new acoustic calculation tool has been published. It is based on Air Flow Resistance (AFR) and calculates several room acoustic descriptors. This article aims to explain why calculations based on the Sabine equation are not always the whole truth. Background – Sabine and ISO 3382-1/2 A long tradition of research shows […]
New approach to Annual UK Acoustic conference
Andrew Parkin – Vice President ANC and Partner at CUNDALL Acoustics gives info regarding latest updates. A recent joint IOA and ANC Annual Conference in Birmingham, UK. Took place on 5-7th November, where the Institute of Acoustics and the Association of Noise Consultants participants joined up bringing together acousticians from a wide range of academic […]
Acoustics and sustainable building session at Euronoise
Building session Murray Hodgson chaired the interesting session focusing on sustainability. It is surprising that this subject and session were not bigger and perhaps also an indication of what still needs to be done to raise awareness and make sure acoustics give a higher standing in sustainable buildings. Perhaps an opportunity for the acoustical societies […]
