MIL-PRF-26542/9C
Frequency
1,000 Hz
5,000 Hz
points
200
Hz
Upper
+4.0
+5.0
limits (dB)
-2.0
Lower
-14.0
-3.0
-11.0
limits(dB)
FIGURE 3. Frequency response envelope for microphone element M-133/U at ground level.
Frequency
5,000 Hz
1,000 Hz
points
200
Hz
Upper
+4.0
+4.0
limits (dB)
-4.0
Lower
-14.0
-2.0
-12.0
limits(dB)
FIGURE 4. Frequency response at 25,000 feet.
3