Room Acoustics

"Good acoustics" is usually the target in room acoustics. The meaning of this depends on the type of room and the intended use. Rooms for musical presentations need a good sound quality at as many seats as possible while lecture halls demand good intelligibility of the teaching person. In case of open-space offices a productive working environment should be ensured. This can mean a focused individual work or a good communication between workers within the same team. CadnaR offers the tools to efficiently handle any of these room acoustic situations and guides you through setting up your acoustic model and assigning reasonable absorption, scattering and transmission properties. Sound pressure levels, reverberation time, speech transmission index (STI) and further psychoacoustic parameters allows you to assess the acoustic quality according to the appropriate standards or cutting-edge assessment approaches.

Open-plan offices

The acoustic challenges in open plan offices are well known to anyone who had to work in such an environment. Although they depend on the use of the office (call center or quiet workspace), a common reason for complaints is the noise caused by coworkers. The intelligibility of speaking coworkers or the overall noise level is often considered as too high, so that the concentrated work is disturbed.

CadnaR allows you to efficiently create or import your office models, assign the acoustic properties and evaluate the effectiveness of your acoustic optimization measures to find the best solution meeting the acoustic targets and other constraints like design and costs. The acoustic assessment can be based on speech levels (and their decay along certain paths) and reverberation time according to DIN 18041, ISO 3382-3 and VDI 2569 but also include innovative intelligibility-based approaches.  

Public rooms and waiting areas

Public rooms like airport terminals, metro stations and waiting areas often rely on public address systems to convey important voice messages. Import your speakers in CadnaR, find their optimal position and alignment, calculate reverberation time, signal level, background noise levels and speech transmission index STI to ensure that these messages are intelligible in a large area. 


A fully occupied beer hall of course has different acoustical requirements than a fine dining restaurant with only few guests. Nevertheless, it is always possible to define targets regarding the intelligibility at the same table or the privacy to other tables. Use CadnaR to calculate the noise levels and intelligibility inside any restaurant for any occupation situation and check if the acoustics are good for a pleasant stay or if measures like additional absorbers, screens or background music would improve the situation at hand.  

Multi - purpose halls

The acoustic of multi purpose halls is challenging since a broad scope of events with quite different acoustic requirements has to be considered.  Use CadnaR to figure out which permanent and which temporary acoustic measures are necessary to ensure that classical concerts, lecture-like situations during conferences, loud sport events, rock concerts or trade fares meet the acoustic expectations. Find out where absorbing materials are placed to their best efficiency and check where noise scattering or noise directing objects should be positioned.