Moreover, it is preferable to receive a warning if there are problems with holes or warped surfaces in the geometry, which could cause leaks of rays, hence leading to unreliable calculations.įacilities for transferring multi-source auralisations The default value in ODEON 17 is 10%, as it has become easier to make “watertight” geometries with plane surfaces using modern modelling tools.
![ease acoustic simulation software ease acoustic simulation software](https://www.mediterraneanacoustics.com/uploads/7/3/3/2/73322645/ease-8_orig.jpg)
This parameter used to be 20% and was hardcoded into ODEON. It determines the maximum allowed percentage of lost rays during a simulation – due to holes and leaks in the model. Ray loss allowed is a new parameter that can also be specified in the Room Setup – see figure below. The value estimated will automatically be inserted in the Impulse response length field. The value estimated by Quick estimate will work fine for most rooms except extremely non-diffuse cases such as outdoor simulations. The impulse response length needs to be long enough in order to simulate parameters such as T 30. This makes it easy to get a suggestion for the Impulse response length to use in calculations. The Quick Estimate can now be accessed directly from the Room Setup. If all of the tiles have the same hard material, then they will be clustered together into a single surface of area “21”.Įstimated impulse response length and Ray-loss allowed If alternating hard reflecting and soft absorbing areas like the top-right figure below, each tile will be an individual cluster area of “1”. Let’s assume a “chessboard-like” surface with 3×7=21 tiles, where each tile has an area of “1”. This setting may also be used for surfaces which have same or similar materials and are located in almost same planes. For curved shapes, like cylinders and domes, the Fractional type must still be used in order to estimate focusing. A more precise area is applied by Odeon now. As a consequence, the Fractional type in the Material List does not have to be specified by the user as often as before. ODEON will automatically recalculate cluster areas whenever materials are being (re-)assigned.
![ease acoustic simulation software ease acoustic simulation software](https://mediadl.musictribe.com/media/sys_master/images/h0d/h6b/8856740593694.png)
This cluster area is used for angle depending absorption and for calculation of the reflection-based scattering coefficient. ODEON will calculate the joint area of surfaces which are in the same surface plane, have joining edges and use same material. Quality of results is improved when the sources are located in another cavity than the receiver – a good example is the side galleries of Hagia Sofia (a room installed with ODEON in the Odeon17Combined\Rooms\CAHRISMA Project) when the source is located at the altar. 4-5, though calculation times will increase.
![ease acoustic simulation software ease acoustic simulation software](https://docplayer.net/docs-images/53/11237713/images/page_3.jpg)
Good results are also obtained with higher TO, e.g. As a consequence, the default Transition Order (TO) has been increased from 2 to 3 for optimum results. In cases where no early reflections (images sources) are found for a given source at a given early reflection order, ODEON will revert to its late reflection method. Calculation algorithms for simulation of impulse responses have been slightly improved for coupled spaces.