Maico MA 2 Series, Operation Manual

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Operation Manual MA 25/MA 25e
MA 27/MA 27e
8104818 Rev. 4 32 19/10/2017
6.3 Pin Assignment
SOCKET CONNECTOR PIN 1 PIN 2 PIN 3
Left
6.3 mm Mono
Ground Signal -
Right
Pat. Resp. -
USB A (OUT) USB B (IN)
1. +5 VDC 1. +5 VDC
2. Data - 2. Data -
3. Data + 3. Data +
4. Ground 4. Ground
6.4 Calibration Values
Table 13 Coupler Types
COUPLER TYPES USED DURING CALIBRATION
DD45: Calibrated using a IEC 60318-3 (6cc) acoustic coupler. Tested in
accordance with ANSI S3.6:2010 / ISO 389-1:1998, Impedance: 10
Ω
DD65: Calibrated using a IEC 60318-3 (6cc) acoustic coupler. Tested in
accordance with ANSI S3.6:2010 / ISO 389-1:1998, Impedance: 10
Ω
Holmco 8103: Calibrated using a IEC 60318-3 (6cc) acoustic coupler. Tested in
accordance with ANSI S3.6:2010 / ISO 389-1:1998, Impedance: 10
Ω
Table 14 Sound attenuation values
SOUND ATTENUATION
Frequency
[Hz]
Reference equivalent threshold sound pressure level [RETSPL, dB re. 20

Pa]
DD45 DD65 Holmco 8103
125 3.0 14.5 12.5
250 5.0 20.0 14.5
500 7.0 32.5 18.5
1000 15.0 39.0 25.0
2000 26.0 36.5 36.5
4000 32.0 34.5 44.0
8000 24.0 40.0 35.0