Without being able to physically hear the beeping sound you are experiencing it is hard to say for sure.
That said, is the beeping sound the sound you have selected in your System Preferences>Sound>Sound Effects?
You also may be accidentally mouse clicking or hitting a key combo that is not allowed and the system error sound will be heard.
If you are hearing a series of beeps this might be a signal of something more serious wrong with your computer. But if this is just happening when using your browser it is probably an error alert beep etc.
Is this beeping heard when using another browser and/or is it heard only when using one particular website?
Also will be helpful to know the exact version of Mac OS X you are using along with the version of Safari you are using. Also to let us know of any Safari extensions you may have added.
cheers,
littleshoulders 🙂
edit: It is also
very important when posting in the Apple Discussions when asking for help that you fill in as much detail about your mac and operating system as possible by going to My Settings in the sidebar at right -> when logged in.
In addition to little's questions --
What applications are open when you're hearing these beeps?
iChat, Skype, AOL, your Mail app? Do you have any iCal alerts set up?
Cheers for the input and taking the time. sounds like it might be some kind of warning relating to a specific website. The sound is the "ping" from sound effects.
Yes, as ~Bee suggests above, it might just be your Mail program signaling a new email if you have it to "Get Mail" on a schedule if your mail application is open when this is happening. This is true of iCal alerts etc. also. Especially, now that we know that it is your system alert sound selected in System Preferences.
I've had the same problem for ages, which drove me crazy and just found the solution: the 2 beeps are notifications of skype contacts coming online. If you go in your preferences in skype, in notifications, uncheck "when contacts become available" and the beeping stops.