ไมค์RTA วัดค่าเสียง Superlux รุ่น ECM888B MEASUREMENT MICROPHONE

SUPERLUX ECM-888B Measurement Microphone 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. Tech Specs 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