Acoustical Services

Nor211A Tapping machine

For making footfall noise transmission measurements in buildings as set out in International and National Standards

A lightweight and self contained sound source for making measurements to the latest versions of the international standards. (ISO140, EN 20140, ASTM E492, etc.)

May be configured for use on standard dimension staircase treads and fitted with rubber tipped hammers for use on surfaces with a decorative finish

Powered from 230 volt AC main supply.

Five hammers each having a mass of 500 g falling from a height of 40 mm (adjustable)

Feedback controlled tapping sequence of 10 impacts per second

Dimensions 320 x 725 x 230 mm. Weight 10 kg

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Nor270(H) Dodecahedron
Loudspeaker

The Nor270 is a high power loudspeaker with omnidirectional characteristics. It fulfils the directional characteristisc required by the ISO 140-3 Standard and delivers a continuous sound power level of 120 dB when driven with pink noise over the frequency range 50-6300Hz via the Nor280 power amplifier.

A version with even higher output is available under the name Nor270H. The sound power level here is 123 dB when driven with pink noise over the frequency range 50-6300 Hz using the Nor280 Power amplifier.

The dimensions are 405 mm diameter and a weight of 14,5 kg. The high power version (Nor270H) has a weight of 19 kg.

Source signals may be provided by the Sound Analyser Nor121, the Sound Level meter Nor118, the external MLS generator Nor257 or the internal Noise Generator in the Nor280.

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Nor280 Power Amplifier

This power amplifier is the 4th generation of specially designed units for building acoustic measurements from Norsonic. It is less than half the size and weight, but twice as powerful as its predecessors.

• Specially designed for Building Acoustic measurements
• Lightweight and rugged construction
• 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 Nor250 or Nor270

Applications

• Sound insulation measurements
• Reverberation time measurements
• Absorption coefficient measurements

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Norsonic Nor130
Sound Level Meter

The Nor130 Series of Sound Level Meters are designed and manufactured to the latest sound level meter standards and comprises two products. The Nor131 is a Class 1 (precision) instrument whilst the Nor132 is designed in accordance with the less accurate Class 2 requirements. Both meters offer the same features with exception of the detachable preamplifier which is only available on the Nor131 version.

Features

* Single measurement range
* Extremely simple operation
* Parallel LAeq and LCpeak
* Large internal memory
* Clock synchronized measurements
* Single measurement range
* USB interface
* Allows use of microphone extension cable (Nor131 only)
* Large back-lighted display
* Complies to IEC and ANSI standards
* Real time 1/1 octave (optional)
* Real time 1/3 octave (optional)
* Statistical analysis (optional)
* Level versus time (optional)

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Sencore SP295
SoundPro Audio Analyzer

The Sencore 295 SoundPro Audio Analyzer provides complete acoustical test capability including sound pressure (dB), noise criteria (NC), and spectrum analysis to identify specific problem components from noise sources and "band pass" problems with noise abatement solutions.

SOUND PRESSURE LEVEL
Accuracy: ± 0.3 dB SPL, steady state
Resolution: 0.1 dB from 30 –130 dBA with supplied mic.
Weighting networks: ANSI A, B, C, and Flat weighted

REAL-TIME ANALYZER
Method:Plots sound energy levels vs. octave band filtered spectrun.
Band Filters: Octave, 1/3 octave, 1/6 octave, 1/12 octave
Filter Accuracy: ± 0.20 dBu at band center frequency
Level Accuracy: ± 1.0 dB with supplied mic

NOISE CRITERIA
Method: Implements ANSI S12.2-1995 for comparison of background noise level octave bands to standard noise criterion curves.
Displays: NC curve, Limiting Band, Octave Band Levels

SIGNAL GENERATOR
Signals: Sine Wave, Square Wave, White Noise, Pink Noise
Output Frequency Range: sine wave 11 Hz to 22 kHz,
square wave 11 Hz to 1.6 kHz, white noise 10 Hz to 20 kHz,
pink noise 10 Hz to 20 kHz

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