Safari, MacBook Pro: Plays a "Pop" sound intermittently. how to remove?

Question

macOS

the browser on a mac plays the "Pop" sound from time to time (which is in System Preferences -> Sound -> Sound Effects).
It appeared recently, I can’t understand what it is connected with (the sound is produced absolutely spontaneously).

Answer 1

the problem turned out to be the following: the miracle of kaspersky was updated and turned on Safe Money by default. when a user visits a site like paypal or a bank, kaspersky notifies that this site is safe (or not).
Since I have Kaspersky alerts turned off, then every time I visit the site that falls under the Safe Money section, only the sound of this alert was emitted (without displaying it on the screen).
solution: disable this functionality in kaspersky