pour info , j'ai reçu une mesure très intéressante avec mon nouveau micro 3402K ;-)
elle est parfaitement conforme , au fichier txt que j'ai reçu gratuitement par mail le
lendemain après l'avoir demandé ....
le fichier txt présente des mesures jusqu’à presque 50khz (48,986khz) :
![[Image: 200219015433212442.jpg]](https://nsa40.casimages.com/img/2020/02/19//200219015433212442.jpg)
EDITING THE ECF CURVE TO 10Hz & BELOW:
Using the magnitude value found at the lowest frequency value (approximately 790Hz) in your ECF, you can edit the ECF, by adding coordinate points (as needed) to the .TXT file for the frequency values you require, between ~790Hz & 10Hz. For example, if you copy and paste the 790Hz line of the .TXT file into the line preceding it and then change the frequency value to 10Hz, you will have a curve with < +/-0.25dB of error between 10Hz & 790Hz. To get accurate measurement to the -3dB roll-off point of the specific model (5Hz [M30, M23], 4Hz [QTC40], 3Hz [M50] & 9Hz [M30BX]), enter the 790Hz value, less 3dB, at the specified low end frequency, for a near vanishing error.
"Hz" "Data"
765.4139, 3.722653
818.201, 3.732873
870.9882, 3.721892
950.1689, 3.684993
1002.956, 3.64995
1082.137, 3.592722
1161.318, 3.542577
1240.498, 3.524497
1319.679, 3.51573
1425.253, 3.50694
1530.828, 3.480078
1636.402, 3.438282
1768.37, 3.393086
1873.944, 3.366498
2032.306, 3.339767
2164.274, 3.313198
2322.635, 3.277122
2480.997, 3.250016
2665.752, 3.232123
2850.507, 3.208656
3061.655, 3.16673
3272.804, 3.122905
3510.346, 3.067703
3774.282, 3.002536
4038.218, 2.948395
4328.547, 2.893232
4645.27, 2.854906
4961.993, 2.823343
5331.503, 2.785936
5701.014, 2.773616
6123.311, 2.736964
6572.002, 2.717312
7020.693, 2.701666
7548.564, 2.696913
8076.436, 2.70928
8657.095, 2.728899
9290.541, 2.754719
9950.38, 2.791242
10663.01, 2.836866
11428.42, 2.882698
12246.62, 2.91787
13117.61, 2.966536
14067.78, 2.98298
15070.73, 2.986911
16152.87, 2.933744
17314.19, 2.939461
18554.69, 2.947208
19900.76, 2.97682
21326.01, 3.004494
22856.84, 3.074421
24493.24, 3.114733
26261.61, 3.104536
28135.56, 3.044489
30167.86, 2.848353
32332.14, 2.446239
34628.38, 1.955539
37135.77, 1.195238
39801.52, 0.2822037
42652.03, -0.4928492
45713.68, -0.9421527
48986.49, -1.046816
elle est parfaitement conforme , au fichier txt que j'ai reçu gratuitement par mail le
lendemain après l'avoir demandé ....
le fichier txt présente des mesures jusqu’à presque 50khz (48,986khz) :
EDITING THE ECF CURVE TO 10Hz & BELOW:
Using the magnitude value found at the lowest frequency value (approximately 790Hz) in your ECF, you can edit the ECF, by adding coordinate points (as needed) to the .TXT file for the frequency values you require, between ~790Hz & 10Hz. For example, if you copy and paste the 790Hz line of the .TXT file into the line preceding it and then change the frequency value to 10Hz, you will have a curve with < +/-0.25dB of error between 10Hz & 790Hz. To get accurate measurement to the -3dB roll-off point of the specific model (5Hz [M30, M23], 4Hz [QTC40], 3Hz [M50] & 9Hz [M30BX]), enter the 790Hz value, less 3dB, at the specified low end frequency, for a near vanishing error.
"Hz" "Data"
765.4139, 3.722653
818.201, 3.732873
870.9882, 3.721892
950.1689, 3.684993
1002.956, 3.64995
1082.137, 3.592722
1161.318, 3.542577
1240.498, 3.524497
1319.679, 3.51573
1425.253, 3.50694
1530.828, 3.480078
1636.402, 3.438282
1768.37, 3.393086
1873.944, 3.366498
2032.306, 3.339767
2164.274, 3.313198
2322.635, 3.277122
2480.997, 3.250016
2665.752, 3.232123
2850.507, 3.208656
3061.655, 3.16673
3272.804, 3.122905
3510.346, 3.067703
3774.282, 3.002536
4038.218, 2.948395
4328.547, 2.893232
4645.27, 2.854906
4961.993, 2.823343
5331.503, 2.785936
5701.014, 2.773616
6123.311, 2.736964
6572.002, 2.717312
7020.693, 2.701666
7548.564, 2.696913
8076.436, 2.70928
8657.095, 2.728899
9290.541, 2.754719
9950.38, 2.791242
10663.01, 2.836866
11428.42, 2.882698
12246.62, 2.91787
13117.61, 2.966536
14067.78, 2.98298
15070.73, 2.986911
16152.87, 2.933744
17314.19, 2.939461
18554.69, 2.947208
19900.76, 2.97682
21326.01, 3.004494
22856.84, 3.074421
24493.24, 3.114733
26261.61, 3.104536
28135.56, 3.044489
30167.86, 2.848353
32332.14, 2.446239
34628.38, 1.955539
37135.77, 1.195238
39801.52, 0.2822037
42652.03, -0.4928492
45713.68, -0.9421527
48986.49, -1.046816