This filter rolls off low audio frequencies to reduce 60 Hz electrical hum, low-frequency wind noise, air conditioner noise, or stand-and floor-transmitted low-frequency vibrations.
When loaded with a low-impedance microphone input (800 ohms or more), the rolloff is 12 dB per octave below 100 Hz. When loaded with 150 ohms, the rolloff is 3 dB at 100 Hz. The output is flat above the rolloff point (with a maximum loss of 0.5 dB at 1 kHz).
Flat above rolloff point; -0.5 dB maximum at 1 kHz
EIA rated at 150 Ω
2.5% maximum (100 mV, open circuit voltage)
Full magnetic shield, steel with gray enamel finish
19 mm (.75in. diameter; 114 mm (4.5in. long