You are here: Home / Products / R&D System / Modules / POL - Polar Far-Field Measurement

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)

MMT — Balloon plot of SPL versus angles θ and φ at 2 kHz

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.

Polar plot showing horizontal and vertical SPL at three frequencies

Specification

S41 Polar Far-Field Measurement

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.