Handheld speaker microphones (hand mics) serve as the primary communication interface in a variety of two-way radio systems, allowing personnel to communicate instantly without needing to access the main radio unit. These devices are widely used in demanding environments such as industrial facilities, construction sites, security operations, logistics, event management, and racetrack communications. In all these settings, microphones must deliver clear and intelligible voice transmission despite challenges like background noise, wind, vibration, and rigorous daily use.
The ECM-DM1508K600 dynamic microphone capsule is engineered specifically to meet these demanding conditions. Its unidirectional pickup pattern effectively focuses on the speaker’s voice while minimizing off-axis noise. With a stable frequency response ranging approximately from 100 Hz to 9 kHz, it captures the essential components of human speech while suppressing low-end rumble and high-frequency hiss. This results in more natural and intelligible voice transmission, even over typical radio codecs and narrowband channels.
Built with a compact 15 × 8 mm form factor, the capsule balances sensitivity and ruggedness to fit handheld microphone housings. Featuring a rated impedance of 600 Ω ±15% and a sensitivity of around −60 dB ±3 dB, it integrates seamlessly into a wide range of two-way radio circuits without requiring complex matching, helping OEMs and accessory manufacturers maintain consistent voice levels across different models.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | ECM-DM1508K600 |
| Dimensions | 15 × 8 mm |
| Directivity | Unidirectional |
| Sensitivity | −60 dB ±3 |
| Impedance | 600 Ω ±15% |
| Frequency Response | 100 Hz – 9 kHz (core measured range) |
Frequency Response Overview
The measured frequency response shows a smooth and stable output across the core 100 Hz–9 kHz band. This effectively reduces low-frequency disturbances such as engine rumble and HVAC vibration, while preserving mid and upper speech harmonics that carry intelligibility and consonant detail. When used in conjunction with appropriate housing acoustics, the ECM-DM1508K600’s unidirectional capsule enables end users to experience clearer voice transmission and fewer repeat confirmations—essential for mission-critical communications.
high-contrast English-labeled curve here.
Typical integrations include handheld speaker microphones used in industrial and construction radios, security operations, logistics and transport communications, event management, and racetrack applications. The capsule’s voice-focused tuning and rugged design make it straightforward to implement in both off-the-shelf accessory lines and custom OEM solutions.
About Our Manufacturing Capabilities
As a specialized microphone capsule manufacturer, we supply dynamic elements to leading global communication equipment brands and accessory makers. Our production lines are optimized for high-volume runs, featuring strict incoming inspection, in-process quality controls, and final testing to ensure consistent unit-to-unit performance. We provide OEM and ODM services—including specification customization, assembly integration support, and tailored packaging options—to meet your product and supply chain requirements with competitive lead times.
