Electret Microphone for Portable Voice Recorders

Electret microphone for portable voice recorders — ECM-B6027AML38-728
High-performance electret microphone suitable for portable voice recorder assemblies.

The ECM-B6027AML38-728 is an omnidirectional electret condenser microphone designed for integration into portable voice recorders. It captures clear and natural speech with low background noise, making it suitable for voice-focused applications in compact recorder assemblies. Learn more about this microphone on our voice recorder electret microphone page.

Why This Microphone Excels for Voice Recorder Assemblies

Portable voice recorder assemblies need microphones that deliver intelligible speech even in dynamic or moderately noisy environments. The ECM-B6027AML38-728 achieves this with an omnidirectional pickup pattern, moderate sensitivity, and low self-noise, and is specifically designed for integration into compact recorder circuits and similar audio capture devices.

Moderate sensitivity ensures clear output without distortion, while the compact construction allows seamless installation in slim recorder housings.

Technical Specifications

ModelECM-B6027AML38-728
DirectivityOmnidirectional
Sensitivity-38 dB ±2 dB
Impedance2.2 kΩ
S/N Ratio75 dB
Max SPL120 dB
Frequency Response20 Hz – 20 kHz (gradual roll-off above 10 kHz)
Dimensions6 × 2.7 mm

Frequency Response Analysis

Frequency response of ECM-B6027AML38-728 electret microphone for portable voice recorders
Mostly flat response from 100 Hz to 10 kHz, subtle 3–5 kHz boost for speech clarity, and gradual roll-off above 10 kHz to reduce high-frequency noise.

The frequency response is mostly flat from 100 Hz to 10 kHz, covering the key range of human speech. A subtle 3–5 kHz lift improves consonant clarity, enhancing speech intelligibility in voice recorder assemblies. Frequencies above 10 kHz gradually roll off to reduce unnecessary high-frequency noise, while low frequencies below 100 Hz are controlled to minimize rumble without affecting natural voice tonality. This balanced response ensures recordings remain clear, natural, and comfortable to listen to.

Recommended Applications

Designed for integration into portable voice recorders and similar compact audio capture devices. Optimized for clear voice capture in a variety of recording conditions, including moderately noisy environments. Suitable for compact recorder assemblies where accurate and natural speech reproduction is critical.

Manufacturing Quality & Customization

Each ECM-B6027AML38-728 microphone undergoes automated assembly and multi-stage quality inspections. Optional customizations, such as waterproof configurations or pre-soldered wires, are available for OEM/ODM projects. Strict quality control ensures reliable performance and consistent audio characteristics across units.

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