- Sound insulation measurements
- Reverberation time measurements
- Absorption coefficient measurements
- WiFi for easy connect to Norsonic measuring equipment.
- Compact, lightweight and rugged construction.
- Battery operated.
Battery powered 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 is applied.
WiFi – no signal cable needed!
Nor282 can be connected to a wifi 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 fulfill 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 bargraph on the top of the spectrum indicating the overall noise level.
The built-in signal generator features White, Pink, Brown, 1/3 and 1/1 band pass filtered noise, Sinewave and STIPA. In addition is swept sine supported when connected to Nor850. Additionally, any signal may be connected to the signal input connector. The signal generator signals are also available on the BNC connector for optional connection to other equipment.
Other useful features
The output attenuator can be set to any level between 0 and -70dB. Unlike many other amplifiers on the market, the output attenuator is well protected from accidentally change. The attenuator is controlled by a rotary switch with well-defined steps. The step ratio may be user preset to 1, 3, 5, 6 or 10 dB.
The Nor282 is protected against defective / short circuited speakers and cables, overvoltage and overtemperatures. A built in two speed fan turns automatically off when the output signal is turned off, ensuring no interference when performing reverberation time measurements.
Output power: >120dB Lw if connected to a Nor276
Protection: Short-circuit and over-temperature protected
Output connector: Speakon NL4MP
Input connector: BNC
Input sensitivity: 1.0Vrms
Input impedance: 47 kΩ//220pF
Equalizer: +6 to -24dB (1dB step) in 1/3 octave bands from 20Hz-20kHz
Noise types: Pink, White, Brown, 1/1 and 1/3 octave BP noise, Sine, Stipa and external via BNC or WiFi.Swept sine is supported from Nor850
Wi-Fi: 802.11b/g/n – 2.4Ghz band ex channel 13. Supports Infrastructure and Access Point
Temperature range (Operating / Storage / Charging):
-10 to +35 °C / -10 to +50 °C / 5 –40 °C Charging is aborted if outside temp range
Humidity: (Operating, Storage and Charge); 20-90% Non-condensing
Enclosure class: IP20
Dimensions / Weight: (DxWxH); 240 x 120x 256 (mm) / 5.1 kg
Mains: 90-250Vac 40-60Hz
Battery operating time: 90 minutes at full power when connected to Nor276 Dodecahedron speaker
Battery type / Capacity: 48V LiFePO4, (Lithium Iron Phosphate) / 288 Wh
Recharge time: 2.5 h
CE conformity standards
EMC EN-55032-2015+A11+A1-2020 EN-55035-2017+A11-2020 EN 301 489-1 V2.2.3, EN 301 489-17 V3.2.4
Radio spectrum efficiency EN 300 328 V2.2.2
Safety and health EN 62368-1 :2014+A11 :2017 IEC 62311:2007 / EN 62311:2008, EN 61010-1:2010/A1 2019
Mains cable, WiFi and remote antennas, remote handswitch