On 27/10/2021 a general meeting was held, during which current issues related to the implementation of the project were discussed.

On 13/10/2021 an administrative meeting of the consortium members of the “Hetman” project was held.

On 06/10/2021 a general meeting was held, during which current issues related to the implementation of the project were discussed.

During the meeting, the detailed scope of measurements on the selected wind farm was discussed.

On 03-05/09/2021, a Conference on Sound Perception was held which was organized by Faculty of Physics Adam Mickiewicz University in Poznań. Prof Anna Preis delivered a paper entitled “Healthy society – towards optimal management of wind turbines’ noise” which abstract is available at https://www.csp-conference.pl/abstracts/

On 13/07/ 2021, a team of AMU scientists (Prof. Anna Preis, Dr. Jan Felcyn, Maciej Buszkiewicz, and Robert Gogol) went on site inspection for one of the wind farms in central Poland. The farm is situated near the main road, partly on one side and partly on the other side.

During the on-site visit, it was possible to see most of the farm. The work of the turbines was obeyed. Due to the little windy weather, the turbines worked at only 20% of their power, which had a direct impact on the sounds they generated. Over a dozen shots of turbine operation from different distances were recorded, using various techniques (both binaural and ambison), enriching the sound layer also with video shots in the 360-degree technique.

The moment of start and stop of the wind turbine and its positioning (rotation) in relation to the wind direction were recorded. The team met with an employee of the local GPZ (main power point) who was very helpful and provided all the necessary information.

Binaural recordings are stereo recordings made using a technique designed to simulate human hearing. Otherwise it is called binaural. It is mainly about keeping the same distance between the microphones as between the human ears and keeping the shape of the head.
Ambisonic recordings are spatial recordings made using the four-channel technique, which allows for complete mapping of the sound sphere around the measurement point.

On 07/07/2021 a general meeting was held, during which current issues related to the implementation of the project were discussed.

On 30/06/2021 a general meeting was held, during which current issues related to the implementation of the project were discussed.

On 16/06/2021 a general meeting was held, during which current issues related to the implementation of the project were discussed.

On 09/06/2021 at the consortium meeting, it was discussed in detail WP4.

Challenges

• Development of a new noise prediction model based on field measurements is not feasible within the scope of the HETMAN project
• Noise regulation is based on long-term exposure levels
• Such levels are difficult to verify through actual field measurements
  • Large fluctuations due to meteo conditions  (propagation and noise generation)
  • Low levels are masked by background noise.

Development of a “Handbook” – practical instructions for:

• choice of prediction model input parameters,
• recommended prediction conditions (wind speed, height, ground conditions, exposure time, etc),
• worst case vs. documented local conditions,
• format of prediction report,
• noise emission measurements,
• noise immission measurements (short-term, instantaneous values).

On 02/06/2021 a general meeting was held, during which current issues related to the implementation of the project were discussed.