Counter Directional Microphone
Specially designed for the among the counter of vitreous partition,the smiling face
Size 30mm*30mm,Weight 27g,Yellow Case
Part of customers: Bank of Beijing ;China Construction Bank;Hua Tang Commercial Centre;
Canada Embassy in China etc.
Parameter:
Monitoring Distance 2mtransmiting distance(shield cable) 3kmFrequency Response 20Hz ~ 20kHzSensitivity -52dBSNR 80dB(1m/40dB)
50dB(10m/40dB)1KHz at 1 PaPolar Pattern directional Dynamic Range 70dB(1KHz at Max dB SPL)Maximum Level Input 120dB SPL (1KHz,THD 1%)Impedance 600ohm (imbalance)Signal Output Extent 2.5Vpp/-25dbMicrophone Electret condenserSpecial Circuit ASIC
Protect Circuit Over-loading protection,Lightning proof Audio Preamp Build-in audio preamp circuit Output Connector Power+, Audio and Public GND
Cable 3 x 0.5mm2 RVVP cable
4 cores line,network's twisted pairs,shield cable Power Voltage DC 12V (8 ~ 20V) Power Current 20 mATemperature -25°C ~ 70°CColor YellowShell's Material Anti-fire material
Dimension 30mm×30mm
Weight 27gStandard CE
Detail introduce:
*Professional wired voice monitor
*Specially designed for supermarket and bank counter.*Clear and natural voice.*Professional Unidirectional microphone, clear speech during 2m.*Strong directional design avoids disturbing from other counters.*Picking voice from bi-directional coverage.*Rubber glue at rear of microphone, convenient for installation.*Advanced echo-canceling technology, successfully eliminating echo interfere. *Beautifull appearance, suitable for bank and supermarket.*Restraining high intensity voice automatically, protecting back-end devices.*Long-distance transmission, cable's maximum length can reach 3km.*Cable: 3 x 0.5mm2 RVVP cable, 4 core phone line, network twist line, etc.*Built-in over-loading protection and lightning proof circuit.
*Pre-amplifier, directly drive DVR, VCR, headphone, loudspeaker etc. *Excellent voice experience, widely working temperature: -25~75 °C*According with CE standard.
A.TRADIO Counter directional Audio Surveillance Microphone