How can I turn the sound off on notifications?

Oh here I am, a year later and with 2016 programs.....I can get to Dropbox settings fine, but there is NO System link to click. And yes, the BONG is really irritating. Any ideas where I'd find System?

Hi Kate, if you are running Windows 10 (even after the current update that came out), the instructions I posted earlier in this thread should still apply.  You will not find those settings in the Dropbox settings, but rather in your computer's settings. 

For those not familiar with the Action Centre, you can also get there by following Michael S.'s instructions above through the Start Menu (Windows icon). Then scroll down until you find Dropbox, and click on the word "dropbox" to access the sliders and choose which notifications (sounds and/or banners) you want on or off.

Yvonne C. method worked. "Settings" was indeed what the option was called on my Windows 10 machine. TYpe "settings" in window search box and it will bring up an option that says "Settings: Trusted Windows App store". Then click "System" > "Notification & actions". Then click "Dropbox" and change the setting for "Play sound when notification arrives" to "off".

I did all this a few months back. Now, the annoying notification is back. And, Dropbox isn't listed in the settings/notifications. The only items listed are outlook, photos (not dropbox) and a few others such as calendar.... any updates on how to fix this? Thank you! 

I've been having the same issue as Samantha for months! I've turned the DB sound notification off dozens of times, and all of a sudden that incredibly irritating sound starts again, and I have do redo, redo, redo! Another Windows 10 issue?

I suspect your only option is to turn off the "notification".

Thanks, Rick. But as described above, I've turned off the DB notification in settings any number of times. It turns itself back on.

could it be an OS notice from    Control Panel\All Control Panel Items\AutoPlay

? Dropbox   "Preferences" Import Tab can take you there.

I want to turn off the SOUND notifications. The Dropbox setting message is about SHOWING notifications, which I want.
How do I turn off the #@@%%$& sound???

I don't know if this started when I switched to Win 10 or if Dropbox made a change but it's super annoying. I'll try the solutions others listed above but I suggest Dropbox look up the definition of "show" and understand it doesn't include SOUND pollution. 

I just figured it out! click on the dropbox icon on your task bar> settings icon in upper right of box > preferences > general > UNCHECK show desktop notifications > apply> ok  and you should be good to go