[Moon-net] another view on noise cancelling headsets

[dfaessler at bluewin.ch]

maybe this helps some of you.

I have in my shelter lots of blower noise by TH308 driver pa and TH347 final. All in all the blowers have to dissipate 4 - 5 KW.

The noise level is high also caused by the metal shields of the shelter which create lots of reflections.

 

I tried commercial noise cancelling headsets and Swissair first class noise cancelling headsets with insufficient results.

Now I have a solution which almost completely solves the problem of noise.

 

I bought the best ear protection headset in the Swiss market. Noise cancelling by isolation is 110dB. It is SUVA approved for working in the ugliest noise. It looks like a bulky headset but has no electronics. 

link: http://www.peltor.se/de/Product.asp?PageNumber=257&Product_Id=64&ProductCategory_Id=55

Disassembling the Swissair headset and installing the noise cancelling electronics into the ear protection headset silenced almost all noise. The IF TS870 from kenwood was modified to deliver DC 8V at the 3rd. pin of the headset connector.

 

HB9BBD Dominique