Listener Free-Field Frequency Responses - BRUEL & KJAER HF HATS 5128 User Manual

Fig.3.6 Typical listener diffuse-field frequency response (DFR) curve for High-frequency HATS (20 Hz – 20 kHz)
30
25
20
15
10
5
dB 0
−5
−10
−15
−20
20
3.3.3

Listener Free-field Frequency Responses

The frequency response of HATS to on- and off-axis sound in the free-field is illustrated in Fig.3.7
to Fig.3.10. These measurements were made using Brüel & Kjær PULSE Audio Analyzer, with an
ear simulator fitted in the left and right ear of Type 5128-C.
0  corresponds to sound incident on the face of Type 5128-C, and 90  corresponds to sound
incident on the left and right ear. More off-axis curves can be found on the data disk.
Fig.3.7
On-axis response of
Type 5128-C (0) in the
free-field
(20 Hz – 20 kHz)
Diffuse-field Response
200
30
25
20
LFR 0 deg L and LFR 0 deg R
15
10
5
dB 0
-5
-10
-15
-20
20 200
2000
Frequency (Hz)
2000
Frequency (Hz)
CHAPTER 3
Characteristics
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