H Series High-definition Noise Cancelling Microphone for Synchronous Monitoring and Recording in the Public Security, Procuratorial, Judicial, and Educational Industries

Product Description:

1. The circular high-definition noise cancelling microphone is designed specifically for synchronous monitoring and recording in the public security, procuratorial, judicial, and educational industries.

2. Adopting high-definition large diaphragm gold-plated microphone head, 5-100 square high fidelity, high sensitivity, high bandwidth, and noise free.

3. Adaptive dynamic noise reduction processing, built-in high-speed DSP digital signal processor Dust proof net design

4. Equipped with a unique electronic noise dynamic closed-loop suppression circuit, it completely eliminates the "hissing" electronic noise.

5. Using a dedicated potentiometer, self volume adjustment, snap on design, suitable for installation in various environments.

6. Built in lightning protection, power polarity reversal protection, and electrostatic protection.

7. Ultra long audio signal transmission technology, using RVVP3 × 0.5 mm2 shielded cable to transmit 3 kilometers without distortion.

Working in an ultra high ambient temperature range of -40 ℃ to 75 ℃, ensuring high-quality recording performance in the backend.

9. Integrated professional SM1258 audio processor, which can directly drive active speakers, hard disk recorders, recorders, etc.

10. Adopt the EU Environmental ROHS Directive 2002/95/EC for construction specifications.

11. Passed the EU CE standards and the construction specifications for the highest level synchronous audio and video recording system.

12. Tested according to relevant standards of the Federal Communications Commission (FCC) and corresponding system construction specifications.

13. Certified according to the international quality management system standard ISO9001.

Product parameters:

Project microphone parameters

Sound pickup range 5-100 square meters (adjustable)

Sensitivity -32dB

Frequency response 20Hz~20kHz

Directional characteristics: Full directionality

Signal to noise ratio 80dB (1m 40dB sound source SPL) 30dB (10m 40dB sound source SPL) 1KHz at 1 Pa

Dynamic range 104dB (1KHz at Max dB SPL)

Maximum sound pressure 120dB SPL (1KHz, THD 1%)

Output impedance 600 ohms unbalanced

Output signal amplitude of 2.5Vpp/-25dB

High definition large diaphragm gold-plated microphone head

Automatic Level Control of ALC Signal Processing Circuit, DSP Digital Noise Reduction, AGC Automatic Gain Control

Connection method: 3 leads (power, audio, common ground)

Power supply voltage linear regulator power supply DC 9V-20V (recommended to use 12V)

Power supply current 30mA

Electromagnetic compatibility complies with GB 9254-2008

Reliability index MTNF ≥ 80000 hours

Shell material: high-grade resin ABS+mesh cover

Dimensions 29mm × Φ 78mm

Weight 70 grams

Supply situation in stock