---
title: "Noise Testing of Rotating Machinery: E-Motor, Gearbox | RTE"
description: "Noise testing for e-motor, gearbox, pump and fan: acoustic end-of-line test system with order analysis, envelope and psychoacoustics. OK/NOK in cycle."
url: https://www.rte.de/en/products-solutions/applications/rotating-machinery/
lang: en-US
---

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Application 

# End-of-line noise testing of rotating machinery

E-motor, gearbox, pump, fan, compressor, actuator and steering: SonicTC.NVH evaluates the airborne and structure-borne noise of every part objectively within the production cycle.

End-of-line noise testing with SonicTC.NVH objectively evaluates airborne and structure-borne noise of rotating machinery within the production cycle; the OK/NOK result is available in under one second and is sent to the machine control via industrial communication interfaces.

Application 

## Test object, fault pattern, method.

| Test object | Typical fault patterns                             | Method                                        |
| ----------- | -------------------------------------------------- | --------------------------------------------- |
| E-motor     | Bearing damage, magnetic noise, imbalance, rubbing | Order analysis, envelope, psychoacoustics     |
| Gearbox     | Gear mesh faults, bearing damage, assembly errors  | Order analysis, modulation analysis, envelope |
| Pump        | Bearing damage, imbalance, rubbing                 | Order analysis, envelope                      |
| Fan         | Imbalance, rubbing, bearing damage                 | Order analysis, psychoacoustics               |
| Compressor  | Bearing damage, imbalance, assembly errors         | Order analysis, envelope                      |
| Actuator    | Gear mesh faults, rubbing, bearing damage          | Order analysis, psychoacoustics               |
| Steering    | Gear mesh faults, rubbing, bearing damage          | Order analysis, envelope, psychoacoustics     |

## Sequence within the production cycle

The part is driven and runs through a defined run-up. SonicTC acquires airborne and structure-borne noise, evaluates the signals with order analysis, envelope analysis and psychoacoustics and compares them with the limits. The OK/NOK result is available in under 1 s and is passed to the machine control via PROFINET, OPC UA, EtherNet/IP, Modbus, TCP/IP or digital I/Os.

![E-drive on the test bench with acoustic sensors](https://www.rte.de/images/bilder/03_produkte/sonic-tc/e-drive-pruefstand-akustik-sensoren.jpg) 

## Limits learned from good parts

Limits are derived from good-part references (statistically, control chart) or in anomaly mode, which learns the behaviour of good parts – bad parts are not required to get started. Variants and limits are configured, not programmed.

## System variants: Mobile, Cube, Line

SonicTC.Mobile for feasibility and service work, SonicTC.Cube as a manual bench test station with sound insulation, SonicTC.Line as a fully automated inline system. Software licence and hardware are decoupled: start mobile and scale into the line later.

## Related content

[ Module Noise Testing Every sound has a cause. We find it. → ](https://www.rte.de/en/products-solutions/sonictc-noise-testing/)[ Module Test Hardware From sensor to system – all from one source. → ](https://www.rte.de/en/products-solutions/test-equipment/)[ Test method Noise testing (NVH) Every sound has a cause. We find it. → ](https://www.rte.de/en/competence/test-methods/noise-testing/)[ Test method Order & modulation analysis Whatever rotates has an order. → ](https://www.rte.de/en/competence/test-methods/order-analysis/)[ Industry E-Mobility Drivetrain, comfort components, batteries, pumps. → ](https://www.rte.de/en/products-solutions/industry-solutions/e-mobility/)[ Industry Automotive EOL noise testing, eigenfrequency measurement, material resonance. → ](https://www.rte.de/en/products-solutions/industry-solutions/automotive/) 

FAQ 

## Frequently asked.

Which rotating machines can be tested acoustically at end of line? 

E-motors, gearboxes, pumps, fans, compressors, actuators and steering systems – wherever bearings, gear mesh or imbalance produce a speed-related noise.

Why order analysis instead of a simple frequency spectrum? 

Order analysis shows vibrations as multiples of the rotational speed. Speed-related faults such as gear mesh, bearing damage or imbalance therefore remain clearly assignable even during the run-up.

How does the test result reach the machine control? 

SonicTC reports the OK/NOK result to the machine control via PROFINET, OPC UA, EtherNet/IP, Modbus, TCP/IP or digital I/Os; results remain traceable.

## Ready to experience acoustic test technology in your line?

Send us your part or schedule an online demo. First assessment within 24 hours.

[Request feasibility study](https://www.rte.de/en/contact/) [Request demo](https://www.rte.de/en/contact/#demo) 

Or call directly: [+49 721 94650-0](tel:+497219465000)