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ใช้ไฟเลี้ยงจากถ่าน 4LR44

The ECM-888B is a 1/4" standard measurement microphone with internal battery. No external power needed for easier connection to various devices. Such as real time analyzer, PC based measurements, or palm size devices. Wide and flat frequency response makes this ECM888B an ideal measurement and recording microphone.

 

Features

• Wide frequency response from 20Hz to 20KHz.
• 1/4" industrial standard dimension.
• Omni directional.
• Internal battery, 4LV44, 6V battery.
• All metal structure, durable and long lasting live time.

Application

• Measurement microphone

Specification 

Type :Back electret condenser
Element:Pressure, FET preamplifier. 
Polar pattern:Omnidirectional

 

Frequency response:20 to 20,000 Hz 



Sensitivity :(at 1,000 Hz Open Circuit Voltage) -43dBV/Pa (7.1mV/Pa) ±3dB 1Pa=94dB SPL
Rated impedance:800Ω 
Minimum load impedance:3,000Ω 
Equivalent noise level:(A-weighted)22dB 
Max. SPL (1 kΩ load):128dB SPL (THD≦1% 1kHz) 
Dynamic range (1 kΩ Load):106dB 
Signal-to-noise ratio:72 dB
Power supply :4LR44 6V battery 
Current consumption :0.5mA, >300 hour 
Polarity : Pin 2 output positive voltage (related to pin 3) when diaphragm receives positive pressure. (Diaphragm moving inward) 
Connector :3 pin male XLR type 
Finish:Metal construction with champagne painted finish 
Environmental conditions : The ECM888B operates between -10℃ to +50℃(14℉ to 122℉) with relative humidity between 0 to 95%. 
Dimensions:Φ21.0x170.0mm (0.83x6.70 in.) 
Weight:150g (5.30 oz.), Battery excluded 
The ECM888B, including the product and packages follow the instruction of EU 2002/95/EC and comply to RoHS.