The sound pattern is really weird for Bowstring. I can hear it clearly (and obnoxiously) on Timber Drive. But so far when I call police they have come here and heard it themselves. We are very shorthanded on police -- a larger problem we might want to address with the City. And maybe when we call police we also need to call our council rep. For me that's Corey Branch, District C, 919-996-3050 (corey.branch(a)raleighnc.gov). Nelda Holder