High-Gain, Low-Noise Back-Electret Mic for Wireless Lapel & Streaming

Overview

Designed for the demanding needs of outdoor live streaming, vocal recording, and on-location interviews, this high-sensitivity back-electret condenser microphone combines HIFI-grade sound reproduction with exceptional noise immunity. Leveraging a balanced source-follower output circuit and a typical SNR of 75dB, it delivers low-distortion, high-restitution audio that preserves the natural warmth of the human voice and the rich harmonics of acoustic instruments. With a maximum SPL of 120dB at ≤1% THD and a built-in filter for enhanced RF suppression, this microphone excels in electrically noisy environments—making it the ideal choice for 2.4G wireless lapel systems, portable recorders, and appliance voice interfaces that demand uncompromised audio fidelity.

Key Features

• Ultra-High Sensitivity (-37±2dB) – Delivers strong output levels even at a distance, perfect for lapel placement and ambient vocal capture without requiring high preamp gain.
• High Signal-to-Noise Ratio (75dB Typ.) – Exceptionally low self-noise preserves vocal details and subtle instrumental textures for clean, HIFI-grade recordings.
• Superior Interference Rejection – Balanced source-follower output and integrated filtering provide robust immunity to electromagnetic and radio-frequency interference, ensuring stable performance near wireless transmitters, smartphones, and home appliances.
• Low Distortion & Wide Dynamic Range – Handles up to 120dB SPL (THD≤1%), capturing everything from whispered ASMR to loud group singing without clipping or coloration.
• Omni-Directional Pickup Pattern – Consistent 360° sound capture, ideal for lapel mics where the talent may turn their head, or for group conversation in podcast and interview settings.
• Ultra-Low Current Consumption (≤200µA) – Extends battery life in wireless systems and portable devices, critical for long-duration outdoor shoots.
• Wide Operating Voltage (1.0–10.0V DC) – Compatible with a broad range of consumer and professional audio devices, from 2.4G transmitters to audio interfaces and appliance control boards.
• Proven Environmental Durability – Rated from -40°C to +80°C with rigorous testing for thermal shock, humidity, and vibration, ensuring consistent performance in unpredictable outdoor conditions.

Technical Specifications

• Directivity: Omni-Directional
• Sensitivity: -37±2dB (RL=15kΩ, Vs=2.0V, @1kHz)
• Signal-to-Noise Ratio: 75dB (Typ.) / ≥74dB
• Max Input SPL: 120dB (THD≤1%)
• Output Impedance: ≤2kΩ
• Operating Voltage: 1.0–10.0V DC
• Current Consumption: ≤200µA
• Storage Temperature: -35°C ~ +60°C
• Operating Temperature: -35°C ~ +60°C

Typical Applications

• Outdoor Live Streaming & Vlogging – Lapel microphone for 2.4G wireless systems, delivering broadcast voice clarity in noisy streets or windy environments.
• Podcast & Roundtable Interviews – Omni-directional pickup ensures all participants are captured evenly when placed at the center of the table.
• Acoustic Instrument Recording – Ideal for wood guitar, violin, ukulele, and piano miking, preserving natural harmonics with high restitution.
• Group Sing-Along & Choir Recording – High SPL tolerance allows capturing powerful vocal ensembles without distortion.
• Smart Home Appliance Voice Pickup – Excellent EMI immunity makes it suitable for range hoods, washing machines, and voice-controlled devices in humid or RF-dense environments.

Advantages

What makes this microphone a standout choice for both content creators and product engineers is its unique combination of high sensitivity, high SNR, and robust interference suppression in a compact, low-power package. Unlike standard electret mics that compromise on noise or distortion, this model delivers HIFI-grade audio restitution with a 75dB SNR and 120dB SPL handling, ensuring that every recording—whether a whispered intro or a crowded live session—retains its full dynamic expression. The integrated filtering and balanced output provide exceptional resilience against RF interference from 2.4G transmitters, smartphones, and household appliances, eliminating the buzz and hum that plague lesser microphones. For outdoor streamers, this translates to clean, stable audio that stays true to the original sound; for engineers, it means a reliable, durable component that performs consistently across temperature extremes and high-humidity environments. This microphone is not just a component—it is the foundation of professional-grade audio in the modern wireless and smart-device ecosystem.