Interoperability
The seamless interoperability of CadnaA (Noise Outdoors), CadnaB (Building Acoustics), and CadnaR (Indoor Acoustics) enables integrated coupling between indoor acoustics, building acoustics, and noise outdoors calculation. This system integration allows for cross-disciplinary acoustic analyses and opens up complex application areas that could not be realized with stand-alone software solutions.
A significant advantage of this approach lies in the use of specialized software tools for each step of the process, ensuring the most suitable calculation methods are applied. In addition, manual data transfer between programs is completely eliminated, as all relevant information is seamlessly exchanged via interfaces. This not only enhances accuracy, but also leads to a substantial increase in process efficiency.
Outside to Inside – Interior Sound Level Calculation for Road Traffic Noise
Interoperability between CadnaA, CadnaB, and CadnaR:
- CadnaA: determination of sound levels at the façade walls of the CadnaB building, caused by road noise sources in the CadnaA model.
- CadnaB: spectral calculation of airborne sound transmission through the façade walls, taking into account building acoustics parameters as well as the exact position of façade elements.
- CadnaR: the interior sound level is determined by simulating the radiation of façade surfaces into a room acoustic model, taking into account both the room’s acoustic response and the sound pressure induced by the external source of road traffic noise.
A practical application of this system is the calculation of interior sound levels at receivers within a room, based on outdoor noise sources such as traffic, industrial plants, or heat pumps.
Interoperability between CadnaA, CadnaB:
Moreover, the integration of CadnaA and CadnaB allows for direct synchronization of the calculated façade noise levels from CadnaA to CadnaB. When using the ISO 12354 calculation standard in CadnaB, the average interior level can be determined on the basis of the façade levels.
Inside to Outside – Façade Emission from Music Clubs
Interoperability between CadnaR, CadnaB, and CadnaA:
- CadnaR: determination of sound pressure levels on the interior surfaces of the façade walls of the music club (source room). Both the position of the sound sources and the acoustic response of the room are taken into account.
- CadnaB: calculation of airborne sound transmission through the façade walls to the outside. The exact positions and acoustic properties of the façade elements are directly incorporated into the building acoustics calculation.
- CadnaA: outdoor noise propagation, starting from the radiating façade of the music club into the surrounding area.
A practical application example is the determination of sound levels at receivers in front of residential buildings, based on sound sources located in noise-intensive indoor spaces such as industrial halls or music clubs.
Room to Room – Sound Level Transmission between Technical Rooms and Meeting Rooms
Interoperability between CadnaR and CadnaB:
- CadnaR: simulation of sound propagation within the room acoustic model of the technical room (source room). Both the position of the sound sources and the acoustic response of the room are taken into account.
- CadnaB: building acoustics calculation of airborne sound transmission from technical room (source room) to meeting room (receiving room). The exact positions and acoustic properties of the partition elements are directly incorporated into the building acoustics simulation.
- CadnaR: simulation of sound radiation from the partition wall into the room acoustics model of the meeting room (receiving room), including the influence of the acoustic response of the room.
Practical applications include the calculation of sound transmission from technical rooms to adjacent noise-sensitive spaces such as meeting rooms, as well as the targeted design of partition walls in industrial halls to acoustically separate noisy and quiet work areas.
