Is is possible that the complainant is being super-sensitive or, dare I suggest, obsessive? I know of someone who wanted his EC to do something about his neighbour’s air conditioner noise. He acknowledged that he had had an acoustics expert measure the sound level and that it was found to be below the level that would invoke any grounds for complaint at his boundary. An EC member kept checking to try to hear and later measure the sound level but never found it operating. The claimed noise level was the same as the measured ambient noise from a light breeze in the trees, birds etc. Eventually the EC just had to say there was nothing they could do. The complainant put in double glazing, which is a good idea for thermal insulation where we are, but he did it to deal with the noise, even though he could not be in a quieter location while living in town. The same guy writes regular letters to the paper complaining about the supposed health effects of inaudible noise from wind farms.