# What the heck was that sound last night? **URL:** \ **Category:** In My Humble Opinion\ **Created:** [March 7, 2017, 6:10pm UTC](https://boards.straightdope.com/t/what-the-heck-was-that-sound-last-night/781634 "2017-03-07T18:10:10Z")\ **Posts on this page:** 5\ **Page:** 2
**Author:** ![WOOKINPANUB](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/wookinpanub/32/132_2.png) [@WOOKINPANUB](https://boards.straightdope.com/u/WOOKINPANUB)\ **Post date:** [March 8, 2017, 8:21pm UTC](https://boards.straightdope.com/t/what-the-heck-was-that-sound-last-night/781634/21 "2017-03-08T20:21:00Z")
> [@gnoitall](#): > > If the cat’s outside more than **WOOKINPANUB** is, the cat may already be familiar with that sound. IME, cats are damn good at filtering out sounds they have encountered with some routineness, even sounds you’d think would be disturbing. Yeah, old Cosmo is pretty chill (and by “chill” I’m mean spectacularly lazy). It might have seemed to strenuous at the time to prick up his ears. or move. or turn his head. ---
**Author:** ![Ukulele\_Ike](https://avatars.discourse-cdn.com/v4/letter/u/df788c/32.png) [@Ukulele\_Ike](https://boards.straightdope.com/u/Ukulele_Ike)\ **Post date:** [March 8, 2017, 11:04pm UTC](https://boards.straightdope.com/t/what-the-heck-was-that-sound-last-night/781634/22 "2017-03-08T23:04:57Z")
It was nothing, honey! Go back to bed! ---
**Author:** ![Peter\_Morris](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/peter_morris/32/359_2.png) [@Peter\_Morris](https://boards.straightdope.com/u/Peter_Morris)\ **Post date:** [March 9, 2017, 12:24am UTC](https://boards.straightdope.com/t/what-the-heck-was-that-sound-last-night/781634/23 "2017-03-09T00:24:56Z")
[The Hum](https://en.wikipedia.org/wiki/The_Hum)(?) ---
**Author:** ![WOOKINPANUB](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/wookinpanub/32/132_2.png) [@WOOKINPANUB](https://boards.straightdope.com/u/WOOKINPANUB)\ **Post date:** [March 9, 2017, 12:49pm UTC](https://boards.straightdope.com/t/what-the-heck-was-that-sound-last-night/781634/24 "2017-03-09T12:49:29Z")
> [@Peter\_Morris](#): > > [The Hum](https://en.wikipedia.org/wiki/The_Hum)(?) Very interestink! I don’t think what I heard (or imagined) would be considered low frequency. It was fairly high pitched and very much, how do I put it. . . it didn’t seem like it was off in the distance or that I was just hearing part of it (like when you can only hear the bass in a song that’s being played far away. Sorry, I don’t know the correct terms). It sounded like it was coming from overhead and I really expected people to come running out of their houses. Quite surreal. A couple of things that have since occurred to me: there was a concert in a nearby park that I could hear pretty clearly. The noise thing happened about an hour after it ended. Maybe it was related to the sound equipment. Like a case of the loudest, longest feedback in history(?) Another thing is there’s a big auto race that starts in a couple of days and you can hear the most ungodly sounds when that’s on. Seems a long shot that they’d be doing anything with that at that time of night with the race still being several days away though. ---
**Author:** ![Leaffan](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/leaffan/32/299_2.png) [@Leaffan](https://boards.straightdope.com/u/Leaffan)\ **Post date:** [March 9, 2017, 1:14pm UTC](https://boards.straightdope.com/t/what-the-heck-was-that-sound-last-night/781634/25 "2017-03-09T13:14:33Z")
Possibly a [street sweeper](https://www.youtube.com/watch?v=d4VH1n1sr4U) cleaning up after the concert? [Previous page](https://boards.straightdope.com/t/what-the-heck-was-that-sound-last-night/781634.md?page=1)