Deutscher Fluglärmdienst e.V.
Technical Method of our low-cost Noise Measurements
Sensor and A/D conversion (A/D = analogue/digital)
The sensor has to be installed outside the house.
Attention has to be paid to protect it against wind and weather.
The sensor is connected to a micro-controller by a cable of 2 m length. This cable can be extended by a maximum of further 5 m.
| operation voltage: | 12V |
| measurement range: | 30dB(A) .... 100dB(A) |
| output voltage: | 0V ... 2,5V |
The micro-controller has to be installed inside the house.
It uses electricity (12V =, power supply contained in delivery).
From the micro-controller, a normal serial cable provides the connection to the PC.
 |
| left: | sensor |
| center: | micro-controller (length 12 cm) |
| top right corner: | power supply |
| bottom right corner: | serial connection to PC (can be extended up to 50 m) |
Costs: 165,00 €.
PC
A cast-off old device with Internet connection, running with any Windows system (from Windows 98SE upwards) will suffice.
Attention: Our programmes will also run with Windows 95. But we advise against Windows 95, as this operating system shows considerable instabilities in building up an Internet connection.
Recommendation: Win98, WinME, WinNT, Win2000, WinXP, Win7
The PC has to be provided by the installer of the station.
From January 2004 on, the software is also available for LINUX !
Costs: old PCs can most often be found free of charge.
Software
All in all, you need two programmes:
Programme 1 for the gathering of measured data
This programme gathers measured data and passes them at an interval of 1 hour to programme 2.
Programme 2 for the data transfer to the Internet
This programme copies the gathered data to our Internet server.
All other programmes run on the Internet server.
Costs: 0,00 €, as all programmes have been developed by 'Deutscher Fluglärmdienst e.V.' and can be used as Freeware.
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