BRUEL & KJAER 4128-C - Chapter 2 Characteristics; 2.1 Construction of the Head and Torso Simulator

CHAPTER 1
Operation
17
Table 1.2 Details of the files on the CD supplied with Type 4128-C. The CD supplied with Type
4159-C includes LFR_L (the left ear listener frequency response) instead of LFR_R
File Name Contents
Frequency
Range
Comments
DFR Listener Diffuse-field Frequency
Response, DFR
20Hz – 20kHz Typical data
L_000_00
L_030_00
L_060_00
L_090_00
L_120_00
L_150_00
L_180_00
L_210_00
L_240_00
L_270_00
L_300_00
L_330_00
LFR, 0 elevation, 0 azimuth
LFR, 0 elevation, 30 azimuth
LFR, 0 elevation, 60 azimuth
LFR, 0 elevation, 90 azimuth
LFR, 0 elevation, 120 azimuth
LFR, 0 elevation, 150 azimuth
LFR, 0 elevation, 180 azimuth
LFR, 0 elevation, 210 azimuth
LFR, 0 elevation, 240 azimuth
LFR, 0 elevation, 270 azimuth
LFR, 0 elevation, 300 azimuth
LFR, 0 elevation, 330 azimuth
20Hz – 20kHz Typical Listener Free-
field Frequency
Responses measured at
elevation angles of 0
and at azimuth angles of
0, 30, 60, 90, 120,
150, 180, 210, 240,
270, 300 and 330.
See Fig.1.11.
Syntax: L_xxxyzz
xxx indicates the
azimuth angle,
y indicates whether the
elevation angle is
upwards (_) or
downwards (-),
zz indicates the
elevation angle.
L_(000330)_30
L_(000330)_60
L_(000330)_90
L_(000330)-30
L_(000330)-60
L_(000330)-90
LFR, 30 elevation, 0330 azimuth
LFR, 60 elevation, 0330 azimuth
LFR, 90 elevation, 0330 azimuth
LFR, –30 elevation, 0330 azimuth
LFR, –60 elevation, 0330 azimuth
LFR,–90 elevation, 0330 azimuth
20Hz – 20kHz Typical Listener Free-
field Frequency
Responses measured at
elevation angles of 30,
60, 90, –30, –60 and
–90, and one each at
azimuth angles of 0,
30, 60, 90, 120,
150, 180, 210
, 240,
270, 300 and 330.
See Fig.1.8
L_(315045)_00
L_(315045)_15
L_(315045)_30
L_(315045)_45
L_(315045)-15
L_(315045)-30
L_(315045)-45
LFR, 0 elevation, 31545 azimuth
LFR, 15 elevation, 31545 azimuth
LFR, 30 elevation, 31545 azimuth
LFR, 45 elevation, 31545 azimuth
LFR, –15 elevation, 31545 azimuth
LFR, –30 elevation, 31545 azimuth
LFR, –45 elevation, 31545 azimuth
20Hz – 20kHz Typical Listener Free-
field Frequency
Responses measured at
elevation angles of 45,
30, 15, 0, –15, –30
and –45, and one each
at azimuth angles of
315
, 330, 345, 0,
15, 30 and 45. See
Fig.1.10
ST_CL
ST_OP
Sidetone, closed ear condition
Sidetone, open ear condition
100Hz – 20kHz Typical data for Ear
canal occluded with ear-
mould simulator DB-
2902 (hole sealed)