Maico MA 25 - Calibration Values and Maximum Levels

Operation Manual MA 25/MA 25e
MA 27/MA 27e
8104818 Rev. 5
31
29/06/2021
6.3 Pin Assignment
SOCKET
CONNECTOR
PIN 1
PIN 2
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 and Maximum Levels
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: 10Ω
DD65 v2:
Calibrated using a IEC 60318-1 acoustic coupler. Tested in accordance
with ANSI S3.6:2010 / ISO 389-1:1998, Impedance: 10Ω
Table 14 Sound attenuation values
SOUND ATTENUATION
Frequency
[Hz]
Reference equivalent threshold sound pressure level [RETSPL, dB re. 20Pa]
DD45
DD65 v2
125
3.0
8.3
250
5.0
15.5
500
7.0
26.1
1000
15.0
32.4
2000
26.0
43.6
4000
32.0
43.8
8000
24.0
45.6