FB-FO-25581-000

Microphones Overview

The Knowles FB-FO-25581-000 is an omnidirectional analog boom microphone designed for communication applications. It features a circular shape with a diameter of 5.9 mm and a total length of 104 mm, including 140 mm of wire leads. The device operates within a frequency range of 100 Hz to 5.5 kHz and has an impedance of 4.4 kOhms. Sensitivity is specified as -53 dB ±3 dB at 74 dB SPL. It requires a supply voltage between 1.3 V and 10 V and draws a current rating of 50 uA.

Microphones Feature Summary

• Omnidirectional acoustic pickup pattern ensures consistent sound capture from all directions.
• Analog output type provides direct signal transmission without internal digital processing.
• Boom assembly design allows for flexible or rigid mounting configurations in headsets.

Microphones Applications

• Communication headsets
• Two-way radio equipment
• Industrial intercom systems

Microphones Procurement Notes

Verify the specific revision of the datasheet when ordering, as component specifications may be subject to change by Knowles Electronics. Confirm that the 1.3 V to 10 V operating voltage range aligns with your system's power supply capabilities. Ensure the 50 uA current consumption does not exceed the budget of your bias circuitry before finalizing the procurement.

Microphones Selection Notes

Select this model when an omnidirectional response is required for clear voice pickup in noisy environments. The 4.4 kOhm impedance must match the input requirements of the connected amplifier or transceiver. Consider the 104 mm length and 140 mm wire leads to ensure proper positioning relative to the user's mouth within the headset structure.

Microphones Part Context

This part belongs to the Knowles boom microphone family, which includes various models designed for different form factors. These microphones are typically integrated into professional communication gear where durability and audio clarity are paramount. The FB series generally offers robust construction suitable for demanding operational conditions.

Microphones Replacement Considerations

Direct substitutes include other Knowles boom microphones such as the FB-FO-25383-000, provided the electrical parameters and physical dimensions are compatible with the existing design constraints.