n0 - The reference efficiency of the system.
n - Refer to Nano
Nano (n) - A prefix meaning 10-9 or 0.000 000 001
National Transportation Safety Board (NTSB) - An independent agency charged with determining the portable cause of transportation accidents and promoting transportation safety.
National Television System Committee (NTSC) - An acronym used to describe the analog color television broadcast standard used in North America and Japan, though also a video transfer standard between compatible devices still in use today through the composite video connection on video devices.
Navigation Receiver - A typical in-dash navigation system consists of a car stereo with a built-in monitor (ranging from 6-1/2" to 7"), an external GPS antenna, and sometimes a hideaway connection box that contains the A/V inputs and outputs. The stereo mounts in the factory stereo slot in your dash. The hideaway box is usually mounted behind the dash or under a front seat. In addition to CD playback and AM/FM reception, most in-dash systems include DVD playback, so you can watch a movie on the built-in screen when the car is parked. Installation of an in-dash system can be complex, as they require connection to power, ground, the vehicle speed sensor, and the parking brake. If your car has a single-DIN or even an old-school shaft style receiver opening, you can always use a portable GPS navigation system.
Navigation System - is a GPS receiver and audio/video (AV) components, also referred to as PND or Route Guidance System, designed for a specific purpose such as a car-based or hand-held device or a smartphone app. The global positioning system (GPS) is a 24-satellite navigation system that uses multiple satellite signals to find a receiver's position on earth.
Negative Door Switches - A door switch circuit that provides the negative polarity trigger for the factory interior lights, key buzzer, factory alarm, BCM, etc.
Negative Lead - The lead or line connected to the negative terminal of a current, voltage, or power source.
Negative Polarity - A reference to the signal's position or voltage below the median line.
Network Switching Subsystem - This is the component of a GSM system that carries out call switching and mobility managements functions for mobile phones roaming on the network of base stations.
Newton (N) - A derived unit of force, named after Isaac Newton in recognition to his work mostly related to Newton’s Second Law of Motion. It is equal to the amount of net force required to accelerate a mass one kilogram at a rate of one meter per second squared.
Noise - 1 Unwanted sound of no specific frequency or amplitude. 2 Random sound of many frequencies not harmonically related (buzzing, hiss, pops, static, whine, etc.).
Nominal Impedance - The minimum impedance a loudspeaker presents to an amplifier, directly related to the power the speaker can extract from the amplifier.
Nominal Power - Measured in watts, it is best represented by RMS (root means square.) This figure tells us how much power the speaker can comfortably handle for a sustained period of time. Also referred to as continuous, or nominal power. Some speakers only list a peak power rating.
Normally Closed - Refers to the electrical state in which a switch may rest. Its contacts are held together or closed so that current is allowed to flow through its contacts.
Normally Open - Refers to the electrical state in which a switch may rest. Its contacts are held apart or open so that no current flows through its contacts.
NSS - Refer to Network Subsystem
NTSB - Refer to National Transportation Safety Board
NTSC - Refer to National Television System Committee
Nucleus - The positively charged center of an atom, made of protons and neutrons, around which electrons orbit.