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I found the new Google Hangouts sounds annoying and they don't provide a way to disable them. The only thing you can do is disable notifications entirely, per contact even, not globally.

How can you just mute the sound alerts for new messages?

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You can disable them globally with the options in the drop-down next to your name. – crdx May 31 '13 at 7:53
Yes, but that's only temporary, for up to 48 hours. – bfred.it Jul 13 '13 at 1:04
up vote 9 down vote accepted

Google now offers an option to mute sounds:

This setting applies to all Hangouts notifications from Gmail, Google+ and the Chrome extension on the same desktop computer.

Turn sound off for notification sounds

  • Click menu ▼ at the top of your Hangouts list.
  • Check the box next to "Mute."

From: Google Hangouts - Turn off notification sounds

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Awesome! They finally added the option! Mute wasn't there until recently. Screenshots: Before/After – bfred.it Dec 16 '13 at 16:33

Edit 2013/12/16: they added an option to mute all sounds, indefinitely. Finally! See this answer

As of today (2013/05/21), you can't (even though it's requested), but I found a way to prevent the sound to be loaded and therefore played.

In short: I redirect the link to the alert audio file (which you can find at the bottom of the answer) to a non-existent one.

This is how:

  1. Download the extension Redirector from the Chrome Web Store
  2. visit: chrome-extension://lacckjdlmkdhcacjdodpjokfobckjclh/html/options.html#ruleMgr
  3. click on [+]
  4. set it like in this screenshot
  5. save
  6. you might have to restart Chrome (or the Hangouts extensions)

Rule editor screenshot

Text to enter:


To see if it works, try this url, it shouldn't load

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Someone could wrap this up in an extension but I suppose (hope) Google will fix it soon, so it's temporary. – bfred.it May 31 '13 at 2:22
I'm going to try this but with adblock and just blocking the URL to the mp3. – crdx May 31 '13 at 7:44
You're totally right, crdx, you should add that as an answer! I don't know how I didn't think of that considering how many custom filters I have – bfred.it May 31 '13 at 14:32
Actually… I tried blocking it with AdBlock: it works in Gmail, but not in the Hangouts extension. Maybe AdBlock doesn't work inside chrome-extension:// pages – bfred.it May 31 '13 at 15:10
Yeah, it probably doesn't. I don't use the extension so I'm just going the adblock route. I'll add it as an answer as well, anyway. – crdx May 31 '13 at 17:39

Use your favourite adblock plugin to block the URL to the mp3, which at the time of writing is:


In Chrome this appears to only work in web interfaces, and not in the browser extension.

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