Page 30

Linear Operating Range

1/3 Octave Band

Table A.40(Continued)

IEC 651

Range 80 dB to 170 dB

 

Frequency

 

 

SPL A Weighting

 

 

 

 

 

 

 

 

 

Linear Operating Range (dB)

 

31.5

 

124

174

 

1000

 

83

173

 

4000

 

83

174

 

8000

 

84

174

 

IEC 804

Range 80 dB to 170 dB

 

 

SPL A

 

LEQ A

 

Weighting

Weighting

 

 

Linear

 

Linear

Frequency

Operating

Operating

 

Range (dB)

Range (dB)

4000

84

 

174

84

 

174

Table A.41- Broad Band C Weighting

Testing was performed using an 18pf input adapter under the following conditions: Reference level 114 dB @ 1 kHz, Reference Range 50 dB to 140 dB, Cal level 394.9 mV for testing level ranges – 20 dB to 70 dB through 50 dB to 140 dB. This represents a nominal sensitivity QE4936 microphone, 34.45 mV for testing level ranges 60 dB to 150 dB and 70 dB 160 dB this represents a nominal sensitivity QE-4110 microphone, 10.29 mV for testing level range 80 dB to 170 dB this represents a nominal sensitivity .

IEC 61672

Range -20 dB to 70 dB

 

 

 

LEQ C

 

 

 

 

Weighting

 

SPL C Weighting

Linear

 

Frequency

Linear Operating

Operating

 

Range (dB)

Range (dB)

31.5

26

75

26

 

75

1000

22

75

22

 

75

4000

24

74

24

 

74

8000

25

75

25

 

75

12500

29

75

29

 

75

Range -10 dB to 80 dB

 

 

 

SPL C

 

 

 

 

Weighting

LEQ C Weighting

Frequency

 

Linear Operating

Linear Operating

 

 

Range (dB)

Range (dB)

31.5

25

 

85

25

85

1000

22

 

85

22

85

4000

24

 

84

23

84

8000

25

 

85

25

85

12500

29

 

85

29

85

 

 

Range 0 dB to 90 dB

 

 

 

 

SPL C

 

 

 

 

Weighting

LEQ C Weighting

Frequency

 

Linear Operating

Linear Operating

 

 

Range (dB)

Range (dB)

31.5

25

 

95

25

95

1000

22

 

95

22

95

4000

23

 

94

23

94

8000

25

 

95

25

95

12500

28

 

95

28

95

ANSI S1.4

Range -20 dB to 70 dB

 

 

LEQ C Weighting

 

 

 

 

Frequency

 

Linear Operating Range

 

 

 

 

(dB)

 

31.5

26

 

75

 

1000

23

 

75

 

4000

24

 

74

 

8000

26

 

75

 

Range -10 dB to 80 dB

 

Frequency

 

 

LEQ C Weighting

 

 

 

 

 

 

 

 

 

Linear Operating Range (dB)

 

31.5

 

25

 

85

 

1000

 

22

 

85

 

4000

 

24

 

84

 

8000

 

25

 

85

 

 

 

 

 

 

 

Range 0 dB to 90 dB

 

 

 

 

 

 

 

 

Frequency

 

 

LEQ C Weighting

 

 

 

 

 

Linear Operating Range (dB)

 

31.5

 

25

 

95

 

1000

 

22

 

95

 

4000

 

24

 

94

 

8000

 

25

 

95

 

053-469 RevC

SoundPro models SE and DL Data Addendum

Page 37
Image 37
3M BK4936, Version A: QE7052 manual Table A.41- Broad Band C Weighting