Shouting between the serves and inbetween the rallies is bad. The chair Umpire often reminds us about that. So no need to worry!
Otherwise making loud noises and cheering/jeering is allowed. Nothing bad about it.
Flash photography is strictly forbidden. This one is generally adhered to, except for a few nutters here & there.
Also mobile phone should be switched to the discreet mode, which was not being done by many people in the upper tiers. I don't know whether this disturbs the players or not.