With the new system preference, WaitingNotifyAtCheckout, if enabled, the audio alert of 'action' will sound with the opening of any patron. Once turned off, the audio alert does not sound. This is not a common sound to hear when just trying to check out to a patron. https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=34668
*** This bug has been marked as a duplicate of bug 37055 ***