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Nor265A microphone boom
Nor265A Microphone boom close up
265A Microphone Boom
Noise sources

Nor265A

Microphone boom

The Nor265A microphone boom/turntable can be used as a stand-alone unit to obtain a reliable spatial average of the sound level by moving a measurement microphone continuously back and forth.

Typical applications include building acoustics measurements in accordance with ISO 10140 and ISO 16283, determination of sound absorption in reverberation rooms according to ISO 354, and sound power measurements following the ISO 3740 series.

 

 

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Nor265A microphone boom

Cable routing through hollow main shaft

Thanks to the oscillating back‑and‑forth movement, a standard microphone cable can be routed through the hollow main shaft without slip rings. This minimizes electrical noise and helps secure clean, repeatable measurement results.

Flexible mounting and acoustic characterization

The unit can be supplied with either a turntable plate or a chuck for flexible mounting of different test objects. In this configuration, it is primarily used for measuring the directional characteristics of acoustic transducers such as microphones and loudspeakers.

Front‑panel control and configurable sweeps

Basic operation is performed from the front‑panel rotary switch. As supplied, eight switch positions (1–8) are preconfigured for ±90° and ±180° sweeps with different sweep speeds. These presets can be redefined via remote commands when the unit is equipped for remote control.

Nor265A close up

 

Optional serial interface for automated control

With the optional serial interface, extended control from a computer is available. This enables precise setting of angular position, speed, and acceleration for automated, repeatable test sequences.

Robust mechanics and smooth motion control

The system is mechanically robust and designed for long, maintenance‑free service. When a movement or sweep is initiated, the speed increases gradually according to the specified acceleration until the selected speed is reached, and the corresponding reversed profile is used for deceleration. By selecting a higher acceleration time, even large or heavy loads can be moved safely and smoothly.

DSP‑based positioning and low noise operation

Nor265A uses a digital signal processor (DSP) to achieve accurate positioning with a straightforward and durable mechanical design. Speed and acceleration accuracy are supported by a precision crystal clock. The result is a versatile solution suitable both for microphone boom applications and as a general‑purpose turntable. Sound emission from the unit is very low, particularly at the lower operating speeds, supporting reliable acoustic measurements in sensitive test environments.

Applications

What are you going to measure?

Environmental noise

Environmental noise

Reliable noise monitoring with sound level meter, stand-alone terminals or large-scale systems.

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Building acoustic

Building acoustic is about the sound that travels between rooms - something you'd rather avoid.

Room-acoustics

Room Acoustics

Room acoustics is about the sound quality in a room, for example in a concert hall.

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Sound Intensity

Measure sound level and direction, even in challenging acoustic environments.

Sound-Power

Sound Power

Sound Power is about how much sound energy a source emits per unit of time, measures in watts.

Noise at Work

Noise at Work

Noise measurement at the workplace for easy mapping and documentation of noise levels

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Norsonic AS, Gunnersbråtan 2
N-3409 Tranby, Norway

+47 32 85 89 00
info@norsonic.com

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