As AP said, AMA doesn't tell you the general field rules. That's the host club's business.

AMA Contest Boards can require certain parameters if you fly competition under AMA rules.

For Example;

Pattern and Scale aerobatics:

PATTERN:•

4.2. Noise limit. Each reciprocating or rotary
piston internal combustion engine shall be equipped
with an effective silencer. The maximum noise level
for all classes shall be 96 decibels measured at three
(3) meters from the center line of the model with the
model standing on concrete or macadam, and 94 dB
if an earth or short grass surface must be used. All
measurements will be taken perpendicular to the
fuselage centerline on the right-hand downwind side
of the model with the motor running at full power;
the microphone to be placed on a stand 30 centimeters
above the ground and in line with the motor. No
noise reflecting objects shall be nearer than three (3)
meters to model or microphone. A score penalty of
five (5) percent of the raw flight score shall be
assessed for those models registering over 96 dB, and
a 10 percent penalty for those registering over 98 dB.
The Contest Director shall have the option of deleting
the noise level requirement at any sanctioned
event.


5. Scale Aerobatic Sound Limits.

5.1. Maximum Sound
Levels. The maximum ground
sound level for all classes shall be:
96dBA measured on soft surfaces
and 98dBA measured on hard surfaces.
Contest Directors may implement
a correction factor due to
unusual conditions.

As you can see, the CD is given considerable latitude to do as local conditions require.

If you are anywhere close to houses there will be "Noise Problems". When I was a DVP in D-6 there was a Soaring Club down in NE Indiana that always had troubles with some neighbors adjoining the sod-farm where they flew. YEP it was NOISE. You can't win! Just do as well as you can and be ready to negotiate.