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