1. DELTA Wind and Energy Consultancy Niels Stengaard Hansen

2. Planning for new windfarms Many aspects to consider, such as –Initial cost and maintenance cost –Wind resources and expected output –Power quality and grid requirements –Noise impact –Shadow impact –Supplier and Technology –Local subsidies –Will I make it a core competence or use consultants

3. The Knowledge Centre DELTA DELTA is one of Europe's leading test-, design-, service-, consulting- and educational organisations within electronics, software, optics and acoustics. More than 60 years of experience 270 employees out of which 50% are engineers Annual turnover 31,5 Mill Euro 50% export 2,500 customer assignments annually Headquarters in DK Locations in DK, UK and SE

4. DELTA Key competencies Manufacturers and suppliers –Testing and validation (EMC, Reliability, noise and vibration) –Specification of components –Certifications and approvals Windfarm owners and developers –Noise impacts –Power quality and grid requirements –Troubleshooting

5. Special Cases Acoustics

6. Principle of Auralisation (simulation of WT sound) Record the windturbine (using HATS or single microphone) Plate Free field HATS Nord2000 Pos. B calculate the Propagation Path to the sound source and manipulate the recorded signal

7. 180 m Auralised Position 3 Wind Speed: 6 m/s (10m) Wind turbines Hub height: 60 m STOP Play manipulated sound in calibrated surrounding

8. Case: 2007 Low Frequency Disturbance by wind turbines Masking Background noise Sound transmission How does meteorology affect sound propagation Listening test Litterature study Measuring Samples for listening test Noise generation

9. DELTA advantage Grown with the industry since the early days Independent Combines experience with ongoing research to support our customers For more info: www.delta.dk customercentre@delta.dk nsh@delta.dk