Nor265A Microphone Boom

Nor265A Microphone boom

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

Main applications are building acoustic measurements (ISO 10140 and ISO 16283), measurement of sound absorption in a reverberation room (ISO 354) and sound power measurements in accordance with ISO 3740 series.

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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