Skip to content

Receiver

The most frequent evaluation method in noise calculation is the calculation of noise levels at defined receiver points. To this end, select the object „Receiver“ from the CadnaA toolbox and place it using the mouse or the keyboard at the desired location on screen.

Object "Receiver" on the toolbox

For the calculation and evaluation at individual receiver points the following features are available that are not found with grid calculations:

  • A calculation protocol which contains all input and intermediate values of the calculation (e.g. the attenuation terms) can be generated.
  • Acoustic rays can be displayed between the sources and the receiver/s which enables a geometric analysis of the propagation paths, including reflections.
  • An exceedance is indicated for - locally or globally - defined limiting values by a red coloring of the receiver symbol.
  • The partial level list shows the partial levels of all sources contributing to the overall level at the receiver point.
  • Receivers can be snapped at buildings to ensure a defined distance to the facade’s surface.

Configuration Industry ISO 9613 (1996)

The following examples are based on the use of a point sound source (industrial source) and application of the standard ISO 9613. In case you want to follow the examples using CadnaA yourself, select this standard on the menu Calculation|Configuration on the tab "Standards" at first.