Sound and Vibration Sources and Accessories

N-250 
Hemi-Dodecahedron Noise Source

• Fulfills the directional characteristic required by the ISO 140-3 standard when mounted on a hard reflecting plane.
• Delivers a continuous sound power level of 120 dB when driven with pink noise at a level of 1 volt RMS over the frequency range 50 to 5,000 Hz. 

N-260
Power Amplifier 

A portable power amplifier for use with the NOR-229 or other suitable loudspeakers.

• May be operated from the 230-volt AC main supply or from a 12- to 36- volt DC source.
• Output power levels of 200 W continuous (8 ohms), 250 W continuous (4 ohms) or 600 W peak (4 ohms ). 

N-211A
Tapping Machine

For making footfall noise transmission measurements in buildings as set out in international and national standards

• A lightweight self-contained sound source for making measurements to the latest versions of the international standards (ISO140, EN20140, ASTM E492, etc.). 

N-265
Microphone Boom Turntable

Indexing system for acoustical measurements. The indexible boom system allows mast or turntable connection to provide precise (0.01 degree) resolution. Used for building acoustics to get precise spatial variation in sound fields, to use with MLS excitation and analysis instruments, or with a turntable to do precise directional characteristics of loudspeakers and microphones.

N-265 Users Guide 831 kb

N-324
N-325 
Dual- and Multi-Channel Microphone Preamplifier Power Supplies

N-335
Microphone Preamplifier Power Supply

Battery-powered eight-channel front end for DAT recorders.

N-336
Microphone Preamplifier Power Supply 

A dual channel front end for personnal DAT recorders. Light and battery-powered.