Larson Davis 824 User Manual

9/29/09 C-19
* NF is electrical noise floor
AC/DC output: AC out 1 is flat
weighted and follows
the gain (tip); AC out 2
is C-weighted with 0 dB
gain (ring)
Measurement range: Flat is measured to
ANSI S1.4 and IEC
60651 standards for
SLM linearity. 1/3 and
1/1 octave filters are
measured to IEC 1260
standard for Class 0
linearity which is ±0.3
dB. The numbers in the
table represent SPL
levels with a typical
377B41 microphone
that has 44.1 mV/Pa
sensitivity.
Measurement Range (RTA mode only)
0dB Gain 10dB Gain 20db Gain 30dB Gain 40dB Gain 50dB Gain
NF Start End
Rang
e
NF Start End
Rang
e
NF Start End
Rang
e
NF Start End
Rang
e
NF Start End
Rang
e
NF Start End
Rang
e
FLAT 324812880253811880213310875213398652638885023407838
1/3 Octave Filters
16.0 2451288323511883125108832259873-12888601237855
31.5 3431288513511883123108852259873-4228866-4237855
63.0 4401288803311885123108850229876-7158833-7187860
125 2 40 128 88 -2 27 118 91 -3 28 108 80 -2 18 98 80 -9 11 88 77 -8 8 78 70
250 3 37 128 91 -3 25 118 93 -3 15 108 93 -4 15 98 83 -10 8 88 80 -9 8 78 70
500 12 33 128 95 4 25 118 93 -3 15 108 93 -4 13 98 85 -10 6 88 82 -10 8 78 70
1000 10 32 128 96 2 20 118 98 -4 15 108 93 -5 13 98 85 -10 6 88 82 -10 8 78 70
2000 15 32 128 96 6 20 118 98 -2 15 108 93 -5 13 98 85 -8 8 88 80 -8 8 78 70
4000 14 32 128 96 7 20 118 98 0 15 108 93 -2 13 98 85 -6 8 88 78 -6 8 78 70
8000 14 32 128 96 7 20 118 98 1 15 108 93 -1 13 98 85 -2 12 88 76 -3 13 78 65
16000 1536128929251189321510893115988301588731187860
1/1 Octave Filters
16.0 2501287824011878130108782309868-13388551287850
31.5 3481288014011878128108802309868-4278861-4287850
63.0 4451288304811870128108800379861-7208868-7237855
125 2 45 128 83 -2 32 118 86 -3 31 108 77 -2 23 98 75 -9 26 88 62 -8 13 78 65
250 3 42 128 86 -3 30 118 88 -3 20 108 88 -4 20 98 78 -10 13 88 75 -9 13 78 65
500 12 38 128 90 4 30 118 88 -3 20 108 88 -4 18 98 80 -10 11 88 77 -10 13 78 65
1000 10 37 128 91 2 25 118 93 -4 20 108 88 -5 18 98 80 -10 11 88 77 -10 13 78 65
2000 15 37 128 91 6 25 118 93 -2 20 108 88 -5 18 98 80 -8 13 88 75 -8 13 78 65
4000 14 37 128 91 7 25 118 93 0 20 108 88 -2 18 98 80 -6 13 88 78 -6 13 78 65
8000 14 37 128 91 7 25 118 93 1 20 108 88 -1 18 98 80 -2 17 88 71 -3 18 78 60
16000 1541128879301188822010888120987802088681237855

Larson Davis 824 Specifications

General

Brand	Larson Davis
Model	824
Category	Measuring Instruments
Language	English