“Are my parents’ neighbors engaging in psychological warfare? This is attached to a dolly pointed toward their yard and sounds a very loud alarm twice a day for 10 minutes.”
A: "Looks to be a vibrating horn. The datasheet states an output of 103dB. These types of horns are usually used in an individual setting where ambient noise is high. This is how this horn sounds."
Same thought here....i realize I am old :-(