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Polar Far-Field Measurement (POL)

Features and Benefits

  • Measurement under free field condition
  • Directivity in polar coordinates
  • Automatic control of turn-tables
  • 2D and 3D display modes (polar, baloon)
  • Open export interface (ASCII)

The POL module offers a fully automated measurement of the sound pressure on a spherical surface under free-field conditions in polar coordinates φ, θ and r. The measurement distance (r) should be larger than the largest dimension (d) of the device (r>>d) and the longest wavelength (r>>λ) to measure directivity in the far field.



Upcoming Hardware

In 2023, Klippel will release a Polar Scanner for a fast, fully automatic 360° directivity measurement. It extends the product range of its existing scanner solutions (Near Field Scanner and Multi-Scanning Workbench) to new applications, such as microphones, portable audio sources, or combinations of both (e.g., smart speaker). By rotating the device under test (DUT) with two turntables the Polar Scanner can measure all kinds of microphones, including studio, test and measurement, MEMS, arrays, headsets, and wearables as well as a small loudspeaker (<10kg), such as studio monitors, smart speakers, and other personal audio devices. Furthermore, smart devices can be comprehensively tested by measuring both the receiving characteristics of the microphone and the radiation behavior of the loudspeakers. 

More information follow soon.


Requirements

Hardware 
Klippel Analyzer 3

Software
dB-Lab Software
VACS Software by R&D Team

Module
Transfer Function Measurement (TRF):
  Measurement of transfer function and harmonic distortion

Accessories
Power Amplifier
• Turn table
Microphone
• PC


Templates

Operation and/or object templates for this module are available when creating a new operation or object in dB-Lab. This provides application specific setups and standard conforms tests.
Please find details on templates in Application Note AN 1001.





Patents

Germany: 102013000684; USA: 9,584,939B2; China: 2014100795121