Is the Klippel NFS capable of true 3d directivity measurements?

[Axo1989]

Yes:

Characterizing the Amplitude Response of
Loudspeaker Systems
Allan Devantier
Harman International Industries Inc., Northridge, CA, 91329, USA

ABSTRACT
The amplitude response of a loudspeaker system is characterized by a series of spatially averaged
measurements. The proposed approach recognizes that the listener hears three acoustical events in a typical
domestic environment: the direct sound, the early arrivals and the reverberant sound field. A survey of 15
domestic multi-channel installations was used to determine the typical angle of the direct sound and the early
arrivals. The reflected sound that arrives at the listener after encountering only one room boundary is used to
approximate the early arrivals, and the total sound power is used to approximate the reverberant sound field.
Two unique directivity indices are also defined and the in-room response of the loudspeaker is predicted from
anechoic data.

Looks good. Thank you again.