We made acoustic measurements as part of a remodelling of our training area at our head offices during the different phases of the acoustic treatment in the refurbishment. This is outlined in a previous Acoustic Bulletin post which highlighted the need for wall absorbers to remove the flutter echos, thus reducing the reverberation time and […]
room acoustics
Reverberation room vs Anechoic Chamber
Here is a short film where our editor Juan Negreira demonstrates some aspects around the acoustic free field, and the broad range of acoustic dynamics which can be found between two acoustic opposites. This is a chance to experience and share difference between being inside a room coated with highly absorptive material versus in a […]
Designing out “Chinook” flutter echoes in speech communication rooms
In September, it was a pleasure to present a work in progress “Optimising the acoustic design for a multi-purpose room used for speech communication activities” at ICA 2019 in Aachen. One of our inhouse head office rooms recently remodelled to accommodate a mixture of training functions. The sound environment for a room designed for speech […]
Find out what a room can sound like – with the Ecophon Acoustic Calculator
Today almost all room acoustic calculations are based on the Sabine formula. Even though it is known that you often get different values when you compare calculations with actual measurements in a room. Therefore, Ecophon has developed a calculator in which the intention is to have more accurate acoustic values before measurements. The Ecophon Acoustic Calculator is […]
Euronoise 2018 – A cochlea in the floor carpet caught my eye
Euronoise 2018 was a great acoustic event, and we at Acoustic Bulletin are proud to have covered 6 sessions on room acoustics in particular. This is the last post written by our development engineer, Heléne Sallenhag – she has covered the session 18:3 – Voice accommodations in room acoustics and noise. How much would you spend […]
The effect of scattering in rooms with acoustic ceilings
Rooms with acoustic ceilings Today we see a lot of public rooms with acoustic ceilings – and that is good! But in these rooms especially the reverberation time and speech clarity does not only depend on the absorption material in the room. Scattering plays an important role for the room acoustic design and therefor furniture […]
Conference on inclusion and hearing impaired children
So, the iCARE research project (improving Children’s Auditory Rehabilitation) is coming to an end, and I had the privilege to participate in one of the last major milestones, recently executed (November 20-21 in Leuven, Belgium) – namely the iCARE conference. Professor Dr Astrid van Wieringen has been project managing all of us during these years, […]
Danish study: 97% of hospital staff are sometimes disturbed by noise
Danish study on healthcare facilities. Presentation day Today I had the pleasure of attending a presentation day at DTU (Technical University of Denmark) arranged by the Electro Department under the title: Acoustic Technology & Centre for Acoustic-Mechanical Micro Systems. The speakers were mainly PhD students and Postdocs and the topics varied from ‘Loudspeaker Array Auralisations […]
The Problem With Acoustic Simulations
Predicting sound absorption is in general troublesome. We have too many definitions; e.g. normal incidence, random incidence, field incidence, angle-dependent absorption coefficient, local-reaction or extended reaction absorption coefficient, etc. Another problem is that there are various standardised methods, but none of them can give an absolute truth. Cheol-Ho Jeong, Associate Professor at DTU, was one […]
Interview with Acoustic Bulletin editor; Yvette Tietema
We’d like you to meet the fantastic editors here at Acoustic Bulletin. Most of them have the same job title, ‘Concept Developer’, but what does that mean? And who’s really behind the title? Because even though they share the same title, are very knowledgeable in room acoustics AND super-friendly and helpful, each of them has their […]
