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

CHAPTER 3
Characteristics
25
Fig.3.6 Typical listener diffuse-field frequency response (DFR) curve for High-frequency HATS (20 Hz – 20 kHz)
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)
−20
−15
−10
−5
0
5
10
15
20
25
30
20 200 2000 20 000
Frequency (Hz)
990226/1
dB
Diffuse-eld Response
30
25
20
15
10
5
0
-5
-10
-15
-20
dB
20 200 2000 20 000
Frequency (Hz)
LFR 0 deg L and LFR 0 deg R
180062