do you mean that it stops making noise after 30 or 60 minutes ( as it is supposed to do) or few hours later ? mine is very noisy during 30-60 minuted after the alarm is on (which is normal) but keeps making that little jungle noise until the next alarm hour, which means always
I ve recently read a comment on cal 918 which says that to stop that noise which occures during alarm time window, you just need to turn the inner alarm dial to anaother hour and the jingle noise stops. but it doesn't work well on mine