Mr. Bobby Healy:

The baseline is 59 dB and 57 dB in Dublin 15. It came from testing the acoustics. Dr. John Kennedy, who is associate professor of acoustics at Trinity College, is an expert in measuring these devices. I saw some questioning of the report earlier, but this is a well-known methodology for testing drones flying by. I noted the member of Dublin City Council measured its drone in an open space. We did not. We measured it flying over streets, culs-de-sac and busy areas where you will get reverberations from buildings. This system is well known and used on the EASA side to quantify the noise impact of the sphere of influence of a drone flying overhead. It is a very scientific and well-proven method.