2006 New York Code - Sound Signal Devices.

 
    * §  24-237  Circulation devices. No person shall operate or permit to
  be operated a circulation device in such a manner as to create  a  sound
  level  in  excess  of  45  dB(A)  when measured inside the dwelling unit
  affected in a line with the window nearest the  exterior  face  of  such
  circulation device. The measurement shall be taken with the window fully
  open at a point three feet from the open portion of the window.
    * NB Effective until July 1, 2007
    * § 24-237 Sound signal devices. (a) No person shall operate or use or
  cause  to  be  operated or used any claxon installed on a motor vehicle,
  except as a sound signal of imminent danger or in connection with use as
  an audible motor vehicle burglar alarm as provided in section 24-238  of
  this code.
    (b)  No person shall operate or use or cause to be operated or used an
  air horn or gong installed on any motor vehicle other than  as  provided
  in section 24-241 of this code.
    (c) No person shall operate or use or cause to be operated or used any
  steam  whistle  attached to any stationary boiler, except to give notice
  of the time to start and stop work or as  a  sound  signal  of  imminent
  danger.
    (d)  No person shall operate or use or cause to be operated or used on
  any public right-of-way any electrically operated  or  electronic  sound
  signal  device (other than a safety device, such as but not limited to a
  car horn or back up signal, that  is  actually  used  for  its  intended
  purpose)  attached  to,  on  or  in  a  motor vehicle, wagon or manually
  propelled cart from which food or any other items are  sold  or  offered
  for  sale  when  the  vehicle  is  stopped,  standing or parked. For the
  purposes of this subdivision the term "stopped" means the halting  of  a
  vehicle,  whether  occupied  or  not,  except  when  necessary  to avoid
  conflict with other traffic or in compliance with a  police  officer  or
  other  authorized  enforcement  officer  or  a  traffic  control sign or
  signal. The terms "standing" and "parked" shall be  as  defined  in  the
  vehicle and traffic law.
    * NB Effective July 1, 2007