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Old 15th October 2014, 18:31   #1
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Default Bosch launches Android app to measure NVH

Bosch has launched an app to measure Noise, Vibration, and Harshness (NVH), Now we can compare NVH numbers of different cars measured using this app as a standard, we only have to come up with a standard location inside and outside the car to place your phone and measure the NVH level. I also suggest the official car reviewers to use this app in future and mention the readings for interior and exterior NVH in the official reviews.

https://play.google.com/store/apps/d...h.nvh_analysis
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Old 16th October 2014, 15:44   #2
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Default Re: Bosch launches Android app to measure NVH

Thread moved to the Technical Section. Thanks for sharing!
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Old 16th October 2014, 18:02   #3
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Default Re: Bosch launches Android app to measure NVH

Very cool!

Of course, i was skeptical at reading your post, since every mobile microphone and accelerometer is different, and there's a reason why actual calibrated measurement equipment costs hundreds, if not thousands of dollars.

However, reading the app description did make me feel a lot better about this. The app developers have put some effort into this:

Quote:
The iNVH app is a unique application developed by Robert Bosch Engineers, to overcome one of the challenges of field engineers today – An innovative tool to support subjective noise assessments in the field and easy connectivity to Bosch NVH engineers. The tool comes in with a simple to use sound level meter (SLM) module, overall level vs. time module and time data module. The app uses basically the inbuilt microphones and accelerometers, which makes is very convenient. The app come built in with latest calibration values for most range of mobiles (as every mobile is different in its own way). However, there is also a sound calibration tool included to improve the accuracy of the noise measurement. This calibration tool is an octave band based tool, as compared to most single value calibration available in the market. The octave band calibration allows the user to do a sensitivity correction in each and every frequency band. For certain mobiles the level of accuracy may not be up-to the mark, hence it is always advisable to do a calibration with an already calibrated phone in the market in order to improve the accuracy. Vibration however is limited to useful frequency of 100 Hz and the mobile weight.
Thanks to the interactive and simple GUI, in addition to being a tool to support subjective assessments, the app can also be used by students who intend to do some simple acoustic measurements for their projects, or operator safety assessments and many other applications. Another feature of the app allows user to record either the processed data or the raw data to be saved and then sent to Bosch engineers for further support or feedback. Theoretically there is no limitation to the size of data that can be stored, and it is depended on the memory available for mobile.
The app by default contains noise calibration values for: Galaxy S Duos, Nexus S, Google Nexus 5, Nexus 4, Moto G, Galaxy S3, Galaxy S4, Note 2, LG Optimus 7, Galaxy S2, HTC Butterfly, Xperia L.
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Old 16th October 2014, 18:18   #4
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Default Re: Bosch launches Android app to measure NVH

Thank you for posting the details for the App.

I am testing it on my Swift tomorrow enroute work!

Swift has tiny window glass so should give some data on NVH levels.

Anurag.
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Old 16th October 2014, 19:59   #5
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Default Re: Bosch launches Android app to measure NVH

Quote:
Originally Posted by Rehaan View Post
Of course, i was skeptical at reading your post, since every mobile microphone and accelerometer is different,
I'm surprised too. Would have expected it to be first released on an iphone, just for this very reason. (Not wanting to start one of those inane ios/ android/ windows battles.)

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