// CODE SNIPPET
N102.1 Induction Loop System Specifications
JUMP TO FULL CODE CHAPTER
- If the ambient electromagnetic noise (generally caused by lighting regulation systems or major power supplies) produces afield strength exceeding 30 mA/meter at frequencies that would decrease the signal-to-noise ratio specified in Item 4, then it is recommended that, unless the noise can be reduced, an induction loop system not be considered.
- If the electromagnetic signal produced by a nearby induction loop system spills over into a new user area being considered for a different induction loop system and produces an average magnetic field strength exceeding 15 mA/meter, then it is recommended that, unless the use of each system can be scheduled so as not to occur simultaneously, an induction loop system not be considered in the new area.
- Given an input signal to the amplifier that has a constant level over a minimum frequency range of 100 Hz to 8,000 Hz, the measured frequency response of the magnetic field generated by the induction loop system over that range shall not vary by more than +/- 3 decibels from the value at 1,000 Hz. In actual usage, graphic equalization of the output signal is allowed.
- Given an output power level equal to the average value specified in Item 6, the minimum signal-to-noise ratio of the program signal carried by the electromagnetic field shall be at least 30 decibels.
- Given a 1,000 Hz input signal to the amplifier that has a level sufficient to produce the minimum signal-to-noise ratio specified in Item 4, the harmonic distortion between the input signal and the program signal carried by the electromagnetic field shall not vary by more than 5 percent over the field strength range specified in Item 6.
- Given a l,000 Hz sinusoidal input signal, at a level equal to the long-time average level of a speech signal, the average value of the magnetic field strength generated within the user area by the loop shall equal 100 mA/meter +/- 3 decibels. The maximum value of the magnetic field strength for a system set to the above recommended average value shall be 400 mA/meter (derived on the basis that the difference of the maximum short-time average level between a speech signal approximately 0.125 seconds and the long-time average level is approximately 12 decibels). Both measurements shall be made 48 inches (1219 mm) above floor level at any point within the user area.
- If a hand-held receiver with earphone(s) is used, the specifications in Items 3, 4 and 5 shall apply. Additionally, the sound pressure level generated by the receiver and earphone(s) shall be at least 80 decibels. The maximum high-frequency average sound pressure level generated by the receiver earphone(s) shall not exceed 130 decibels.
- The system must have inputs capable of accepting signals at line level and microphone level and must be capable of interfacing with existing public address systems or stand-alone.
- Any stand-alone devices powered by 110—120 volt AC used as part of the system must have been tested by an approved laboratory.
- All input and output wiring must comply with the New York City Electrical Code.
- The installation of all stand-alone components of the system must comply with the New York City Electrical Code.
Related Code Sections
N102.1 Assistive Listening Systems Performance Standards, Induction Loop System Specifications
be reduced, an induction loop system not be considered. If the electromagnetic signal produced by a nearby induction loop system spills over into a new user ...
NYC Building Code 2014 > N Assistive Listening Systems Performance Standards > N102 Induction Loop System > N102.1 Induction Loop System Specifications
N102.1 Assistive Listening Systems Performance Standards, Induction Loop System Specifications
be reduced, an induction loop system not be considered. If the electromagnetic signal produced by a nearby induction loop system spills over into a new user ...
NYC Building Code 2008 > N Assistive Listening Systems Performance Standards > N102 Induction Loop System > N102.1 Induction Loop System Specifications
N102.1 Assistive Listening Systems Performance Standards, Induction Loop System Specifications
Where induction-loop systems are provided for hearing aid purposes, the system performance shall be in accordance with IEC 60118-4:2014.
The ...
NYC Building Code 2022 > N Assistive Listening Systems Performance Standards > N102 Induction Loop System > N102.1 Induction Loop System Specifications
3.4.7* Definitions, Looped Sprinkler System
A sprinkler system in which multiple cross mains are tied together so as to provide more than one path for water to flow to an operating sprinkler ...
Standard for the Installation of Sprinkler Systems 2016 of New York City > 3 Definitions > 3.4 Sprinkler System Type Definitions > 3.4.7* Looped Sprinkler System
608.13.4 Water Supply and Distribution, Barometric Loop
Barometric loops shall precede the point of connection and shall extend vertically to a height of 35 feet (10 668 mm). A barometric loop shall only ...
NYC Plumbing Code 2014 > 6 Water Supply and Distribution > 608 Protection of Potable Water Supply > 608.13 Backflow Protection > 608.13.4 Barometric Loop