For detection of scalar waves you might like to start here...Posted by vansak (here)
If anyone has any suggestions for detecting frequencies being channeled please let me know as there is absoluely no doubt I could capture this in the act as it fires up in the late hours like clockwork.
Tom has been blowing the whistle on this stuff for quite some time now. The page also references John Bedini and one would be ill advised to ignore what he might have to say...
For detection of the Hertzian variety you might start with somehing like a Hewlett Packard Spectrum Analyser($25k) and say a Brille & Kerr refrence microphone($4k). Neither peice of kit is cheap but you do get what you pay for. A good sound reinforcement hire company may be able to rent you this or similar and should have a more than enthusiastic Sound Engineer on hand to explain how to operate it.
There are of course many here who have skillsets pertaining to energy fields way beyond my mechanical approach and hopefully they will come forth with practical suggestions from that perspective as well. From what you say you seem to already have sensitivities in that direction anyway.
Good luck with attempts at capture/measurement as I am sure we all look forward to hearing about any results, positive or otherwise.