### Objectives

This article shows how to use MANATEE electro-vibro-acoustic simulation software to quickly calculate acoustic noise due to Maxwell forces using** Electromagnetic Noise Synthesis algorithm**.

### Principle

ENS uses structural and acoustic model linearity to speed up calculations and give more physical insights as detailed in the article dedicated to ENS. ENS process separates calculation of operational magnetic loads (that can be evaluated using LIA or LEA techniques) and the vibroacoustic characterization of the electrical machine.

MANATEE software v1.04.09 mechanical module can apply ENS algorithm to the following structural models:

and to the following acoustical models:

- Actran acoustical FEA commercial software

Coupling with other software are under study.

### GUI implementation

TBC

### Scripting implementation

To perform ENS, a set of acoustic FRF must be first calculated. The ENS process based on wave FRF is then activated. The availability of a pre-calculated FRF is described with

`Input.Simu.type_load_FRF = 2`

### Plot commands

The complete list of plot commands is available on MANATEE plot commands webpage. The following visualizations are more particularly related to this module:

- order tracking analysis per load case
- vibration or noise level of a specific harmonic for each load case

### Validation cases

TBC

### See also

To avoid running acoustic numerical models, Electromagnetic Vibration Synthesis combining with ERP acoustic model can be used.