Noise Source

  • Norsonic NOR265A Noise Source

    Explore the Norsonic NOR265A Noise Source — engineered for precise, standards-compliant acoustic measurements. Applications Building Acoustic measurement in accordance with ISO 10140 Reverberation Time measurements in accordance with ISO 354 Sound Power measurements in accordance with ISO 3740 Directional response measurements of loudspeakers and microphones About Due to the oscillating back and forth movement a normal microphone cable may be fed through the hollow main shaft without the need for slip rings thereby ensuring very low electrical noise levels are maintained. The unit may be equipped with a turntable plate or chuck for mounting of different test objects. In this configuration the main application is measurement of directional responses of acoustic transducers like microphones and loudspeakers. The unit is manually operated by the rotary switch on the front. As delivered from the factory eight of the switch positions (1, 2… 8) corresponds to ±90° and ±180° sweeps with different sweep speeds. These settings may be redefined by using remote commands if the unit is equipped for remote operation. Extended control of the device is possible by remote commands from a computer by use of the optional serial interface. This allows accurate control of angular position, speed and acceleration. The unit is robust and constructed for years of maintenance-free operation. When a movement or sweep is started, the speed will gradually increase as specified by the acceleration instruction until the selected speed is obtained. The reversed speed-profile is used for deceleration. By specifying a higher value for the acceleration time, even a large or heavy object may be handled. Nor265 uses a digital signal processor (DSP) to obtain accurate positioning with simple and robust mechanical design. Accuracy in speed and acceleration are ensured by the use of a precision a crystal clock. The design allows a unique combination of specifications suitable for microphone boom applications as well as a general turntable. The sound emission from the unit is very low, especially when operated at the slower speeds. Features Oscillating microphone boom for spatial averaging in building acoustics or sound power measurements. Building acoustics measurements in accordance with ISO 10140 and ISO 16283. Reverberation time measurements in accordance with ISO 354. Sound Power measurements in accordance with ISO 3740 series. Directional response measurements of loudspeakers and microphones. Accurate positioning. Sweep of ±90º and ±180º. Direct control or remote control from a PC via LAN interface. User defined sweeps. Selectable sweep times. Supported by Nor850. LAN interface. Nor265A may be equipped with a turntable (optionally). Specifications Mounting: Tripod which allows inclined traverse plane Diameter of tripod mounting stud: 3/8” Main axle dimension: Outer diameter: 30 mm Inner diameter: > 22 mm Units to be mounted on turn axle: Microphone boom (option 1) Turn table plate – diameter: 300 mm (option 2) Chuck (2 – 13 mm) (option 2) Boom radius: 0.8 – 2 m (continuously adjustable) Rotation angle: Programmable / any angle. May also be set to rotate continuously at a specified direction and speed. Resolution: 0.01° Angle accuracy (no torque): Better than 0.8°. Typical better than 0.05° if moved in same direction. Max load (any direction): 500 N Max torque loading: 1.6 Nm Typical error from loading torque: 0.3 deg/Nm Power supply: 85-264VAC / 47-63Hz Fuses: 2.5 A slow blow (IEC 60127) Remote operation: LAN Noise emission: Less than 10 dB A (at rest) Typical noise A-weighted: 40 dB at 5 sec/rev 27 dB at 10 sec/rev 23 dB at 20 sec/rev The noise is measured in an anechoic chamber with the moving microphone placed on the boom – 1,5 m from the main body. Temperature range: -10 to 50 °C Humidity: 0 – 90 %RH

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  • Norsonic NOR277 Noise Source

    Discover the Norsonic NOR277 Noise Source — engineered for precise, standards-compliant acoustic measurements. Highlights Self calibrating test! Remote operation from hand switch or PC. Low weight 10 kg (22 lb) incl. battery and wireless remote. Features Impact noise measurements designed to meet the requirements given in ISO 717-2, ISO 10140-3, ISO 16283-2, ASTM E492 and ASTM E1007. Determination of single number quantity index Ln,w, in accordance with ISO 717-2 and ASTM E-989 Remote operation from hand switch or PC. Mains or battery operation. Powered from 85-264 volt AC main supply. Built in Lithium Ion rechargeable batteries. Battery capacity: Typical 1 hour with intermittent use and 45 minutes of continues operation. Battery de-rating: <5% loss in capacity per 100 discharge/charge cycles. Charging time: 2 hours. Compact and rugged construction. Low weight 10 kg (22 lb) incl. battery and wireless remote. Five hammers each having a mass of 500 g falling from a height of 40 mm (adjustable). Tapping sequence of 10 impacts per second, rpm controlled via servo feedback loop. Built in self check of hammer fall speed, and tapping sequence. Retractable feet. Dimensions feet retracted: 165 x 230 x 495 mm (6,5 x 9,1 x 19,5″). Dimensions feet extended: 265 x 230 x 495 mm (10,4 x 9,1 x 19,5″). Standards ISO 717-2 ISO 10140-3, ISO 10140-5 Annex E ISO 16283-2 ASTM E492-22, ASTM E1007:21, ASTM E989:21 Specifications Hammers: 5 hammers @ 500 g. Effective falling height 40 mm (adjustable) Tapping sequence: 10 impacts per second, rpm controlled via servo feedback loop. Power: 84 – 264 V, 47 – 63 Hz Battery operation: Optional built-in Lithium-Ion rechargeable battery. 7.2V / 2350 mAh / 16,9 Wh Battery capacity: Typical 1 hour with intermittent use and 45 minutes of continues operation. Battery de-rating: <5% loss in capacity per 100 discharge/charge cycles. Battery charging time: 2 hours Power consumption: Less than 30 W Dimensions: H x L x W: 230 x 495 x 165 (265 feet extended) mm. Add 50 mm to the height for handle. Weight: 10 kg (22 lb) including battery and wireless remote option EMC compliance according to EN 50081-1 and EN 50082-1, Safety according to EN 61010-1-1993 and Machine directive 89/392

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  • Norsonic NOR278 Noise Source

    Discover the Norsonic NOR278 Noise Source — engineered for precise, standards-compliant acoustic measurements. Applications Comparison method for determination of sound power of noise sources according to ISO 3741, ISO 3743-1, ISO 3747 and other methods requiring ISO 6926 compliant reference sound sources. About The reference sound source Nor278 is designed to produce a stable and uniform sound power output with unique long-term stability. The high sound power output makes it ideal for sound power measurements in a noisy environment. The rugged, but yet portable and light weight construction is perfect for field us as well a laboratory use. Every effort is made in the design to ensure a uniform frequency response and optimum directional characteristic well inside the requirements in ISO 6926:2016. Each unit is carefully assembled and individual tested. To enhance the level of quality and traceability of your measurements every unit is accredited calibrated by the Norsonic Calibration Laboratory (NCL) in accordance to ISO 6926:2016. This service is also offered for periodic re-calibration. Accredited Calibration NCL is a calibration laboratory accredited according to ISO/IEC 17025, carrying out calibration of acoustical equipment for measuring noise (sound level meters, microphones, dosimeters and acoustical calibrators), accelerometers, tapping machines and reference sound sources. The accreditation is recognized internationally through European and global multilateral agreements in more than 40 countries around the world made through the international Laboratory Accreditation Cooperation – ILAC. Thus the Norwegian Accrediting body has established that Norsonic calibrations are internationally accepted as being carried out in an accredited laboratory. Features A weighted Sound power output: 94 dB re 1 pW (50 Hz line frequency) Sound power 50 Hz – 20 kHz: 94 dB re 1 pW (50 Hz line frequency) Fulfils ISO 6926:2016 (ANSI S12.5-2016) for reference sound sources in the extended frequency range 50 Hz – 20 kHz. Delivered with accredited calibration certificate Long-term stability Standards ISO 3741 ISO 3743-1 ISO 3747 ISO 6926 ISO 7779 Specifications Device type: Nor278: Reference sound source according to ISO 6926:2016 for extended frequency range 50 Hz – 20 kHz Nor278/US: Reference sound source according to ISO 6926:2016 for standard frequency range 100 Hz – 10 kHz Power Supply:  220-240 Volt/50 Hz  /  110-120 Volt/60 Hz Power consumption:  <750 W (typical 650 watt) (50 Hz)  /  <900 W (typical 800 watt) (60 Hz) Fuses:  10A – slow blow (220 V)  /  20A – slow blow (110 V) Sound power output each 1/3-octave frequency band: >75 dB re 1 pW (50 Hz) / >77 dB re 1 pW (60 Hz) in each 1/3-octave bands in the range 100 Hz to 10 kHz. A-weighted sound power output:  94 dB (typically) (50 Hz)  /  97 dB (60 Hz) Weight: 18 kg (50 Hz)  /  24.5 kg (60 Hz) Height exclusive handle: 396 mm Height inclusive handle: 464 mm Diameter: 283 mm Temperature: -25° to 50°C. Above 35°C intermittent use only. Humidity: Up to 90 %, non-condensing.

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  • Norsonic NOR279 Noise Source

    Discover the Norsonic NOR279 Noise Source — engineered for precise, standards-compliant acoustic measurements. Features Hollow sphere ball Outside diameter 178mm and thickness 32mm Silicone rubber material Equivalent mass 2,5 kg (+/- 0,1kg) Coefficient of restitution at 0,8 (+/- 0,1) Rubber hardness 40o (+/- 5o) Standards ISO 10140-3:2021 ISO 10140-5 Annex F:2021 ISO 16283-2:2020 JIS A 1418-2 Specifications Rubber raw material: Silicon rubber Shape: Hollow sphere, diameter 178 ±1 mm, wall thickness 32 mm Equivalent mass: 2.5 ±0.1 kg Rebound coefficient: 0.8 ±0.1 Rubber hardness: 40º ±5º Impact force characteristics: Impact force waveform (Example)

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  • Norsonic NOR280 Noise Source

    Discover the Norsonic NOR280 Noise Source — engineered for precise, standards-compliant acoustic measurements. Applications Sound insulation measurements Reverberation time measurements Absorption coefficient measurements Highlights Lightweight and rugged construction, only 3.5 kg – ideal for portable use on-site Built-in noise generator Wireless remote control of noise generator Features Specially designed for Building Acoustic measurements Lightweight and rugged construction – only 3,5 kg! Self contained noise generator 500 Wrms output power Emits 120 dB sound power level in the 50—5000 Hz frequency range when used with Norsonic dodecahedron loudspeakers types Nor275 or Nor276 Wireless remote control of noise generator Equalization network to optimise acoustic output from speaker Balanced signal input for low noise and limited cross talk problems Standards ISO 717-1, ISO 717-2, ISO 717-3 ISO 1793-1, ISO 1793-2, ISO 1793-3 ISO 10140-2, ISO 10140-3 ISO 10140-5 Annex D ISO 10848-1, ISO 10848-2, ISO 10848-3 ISO 354 ISO 3382-2 Specifications Output: Short-circuit and over-temperature protected Output connector: Speakon NL4MP Output power: 500 WRMS RMS into 4ohm 250 WRMS RMS into 8ohm THD+N < 0.1% The built-in LP and HP filters ensure that the output power matches the Norsonic Nor275 and Nor276 series of dodecahedron loudspeakers Peak power: >1 kWPEAK into 4ohm Output current: Maximum 35 A Input: Balanced input to avoid ground loops and cross talk to signal cables Input connector: XLR Input sensitivity: 1.0 VRMS Input impedance: 10 k//220 pF Dimensions: (D x W x H) 275 × 110 × 246 [mm] 11 x 4,3 x 9,7 [inch] Weight: 3,5 kg Temperature: –20 to +35 °C Rel. Humidity: 0–90% Enclosure class: IP20 Mains: 220 VAC (±10%) or 110 VAC (±10%) Fuse: T 3,15A (220 V), T 6A (110 V) EMC and Safety Standards: EN 55103-1, EN 55103-2, IEC 61340-5 part 1&2, IEC 61010, FCC part 15b part 1&2 CE Conformity: EMC compliance according to EN 50081-1 and EN 50082-1, Safety according to EN 61010-1-1993 and Machine directive 89/392 Accessories included Mains cable, Output connector, Wireless on/off remote control

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  • Norsonic NOR282 Noise Source

    Discover the Norsonic NOR282 Noise Source — engineered for precise, standards-compliant acoustic measurements. Applications Sound insulation measurements Reverberation time measurements Absorption coefficient measurements Highlights WiFi for easy connect to Norsonic measuring equipment. Compact, lightweight and rugged construction. Battery operated. About 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. Remote hand-switch A wireless remote hand-switch to turn on/off the noise signal is included. Graphical equalizer 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. Noise types 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. Features Specially designed for building acoustic and room acoustic measurements. Battery operated. Graphical user defined equalizer to optimise acoustic output from speaker. WiFi for easy connect to Norsonic measuring equipment. Compact, lightweight and rugged construction. Self contained noise generator. Emits 120 dB sound power level in the 50 – 5000 Hz frequency range when used with Norsonic dodecahedron loudspeakers types Nor275 or Nor276. Wireless Noise on/off hand switch. Standards ISO 717-1, ISO 717-2, ISO 717-3 ISO 1793-1, ISO 1793-2, ISO 1793-3 ISO 10140-2, ISO 10140-3 ISO 10140-5 Annex D ISO 10848-1, ISO 10848-2, ISO 10848-3 ISO 354 ISO 3382-2 Specifications Output power: >120 dB 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 -24 dB (1 dB step) in 1/3 octave bands from 20 Hz – 20 kHz 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 – 250 Vac 40 – 60 Hz Battery operating time: 90 minutes at full power using pink noise signal when connected to Nor283 / Nor276 Dodecahedron speaker Battery type / Capacity: 48 V 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 Accessories included Mains cable, WiFi and remote antennas, remote handswitch

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  • Norsonic NOR286 Noise Source

    Discover the Norsonic NOR286 Noise Source — engineered for precise, standards-compliant acoustic measurements. How to use How to fold and Reverberation Time Measurement Nor145 with Impulse Noise Source Please see Internoise publications by Professor Emi Toyoda, Kobayasi Institute of Physical Research, explaining the characteristics and the filed survey method using Origami impulse source for sound insulation measurements. Internoise 2011, Filed survey method using Origami impulse source for sound insulation measurements Internoise 2009, Characteristics of the origami impulse source

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