BL-23958-000

Overview

The Knowles BL-23958-000 is a miniature piezoelectric microphone designed for sound detection applications. It features an omnidirectional frequency response ranging from 20 Hz to 10 kHz, with a sensitivity of -69dB ±3dB at 74dB SPL. The device utilizes solder pad terminations and measures 0.310 inches by 0.218 inches (7.87mm x 5.54mm). It operates with a rated voltage of 1.3V and presents an impedance of 4 kOhms. The rectangular package allows for compact integration into various electronic assemblies requiring reliable acoustic sensing.

Feature Summary

• Piezoelectric transduction mechanism converts acoustic energy into electrical signals
• Omnidirectional pickup pattern ensures consistent sensitivity across all angles
• Miniature rectangular form factor enables space-constrained PCB integration

Applications

• Consumer electronics audio input modules
• Industrial noise monitoring systems
• Security and alarm system acoustic sensors

Procurement Notes

Verify the specific datasheet version to confirm terminal compatibility and environmental ratings before integration. Ensure that the supply chain source provides authentic Knowles components to guarantee performance consistency. Cross-reference the part number against official manufacturer catalogs to avoid counterfeit substitutions. Confirm that the procurement documentation includes necessary compliance certifications such as RoHS status for your target market regulations.

Selection Notes

Select this component when a robust, low-profile acoustic sensor is required for general sound detection rather than high-fidelity audio recording. The piezoelectric design offers durability in environments where condenser microphones might fail. Consider the 4 kOhm impedance when designing the interface circuitry to ensure proper signal coupling. Evaluate the 20 Hz to 10 kHz bandwidth against the specific frequency requirements of the target application to ensure adequate coverage.

Part Context

This component belongs to the Knowles BL series of miniature microphones. The series is characterized by its use of piezoelectric materials for sound conversion. These devices are engineered for reliability in mass-produced consumer and industrial goods. The BL series typically emphasizes compact dimensions and straightforward soldering interfaces for automated assembly processes.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.