Nor282 Power Amplifier

The power amplifier ensures that you get the maximum sound pressure level out of the Norsonic range of speakers. The built-in battery has an operating time of up to 90 minutes @ full power. Switching between mains and battery operation is seamless. Batteries are charged once mains are applied. 

 

Nor282 can be connected to a Wi-Fi network or be set as an access point. The latter is useful for field application where you can establish a 1:1 connection to a Nor145, Nor150 or Nor850. From the instrument or the 850 software you take full control of the power amplifiers signal generator, equalizer, and output level. A wireless remote hand-switch to turn on/off the noise signal is included. Thanks to the large colour display and the graphical equalizer it is easy to adapt the speaker’s frequency response to the room response to fulfil the requirements for difference between adjacent 1/3 octave bands as per ISO 10140-5 and ISO 16283-1. 

 

Fixed spectrum adaption is made for the Norsonic range of speakers which easily can be adjusted to optimize the spectrum to the room response. Additionally, three user defined spectrum may be configured. A low and high pass filter is added to prevent the speakers from frequency content outside the desired frequency range for BA testing. 

 

This is to prevent the noise signal causing the speaker cone to move with higher amplitude outside its design limits and wasted energy in the low frequency area. For special use, all filtering can be turned off. The output signal including the equalized spectrum shaping is displayed in real time on the colour display, including a separate bar graph on the top of the spectrum indicating the overall noise level.