Test Headset Head Mounted USB ENC Noise Reduction Student Exam Earphones with Integrated Sound Card

Feature: 1. Noise Reduction: Through the front and rear dual microphone array pickup, the front microphone picks up the main sound to produce a sine wave and the cosine wave of the background noise picked up by the rear microphone is canceled out, and the main noise is filtered through the noise chip Calculate separation to meet the teaching and test pickup requirements of weakening and filtering out background noise. 2. Heart Shaped Included Angle Pickup Calculation Technology: It adopts the heart shaped included angle pickup calculation technology. Only a single sound source can be recorded within the cardioid included angle, while the sound source outside the heart‑shaped included angle is weakened and shielded. . 3. With Sound Card: Built in sound card chip, through the chip to digitally decode and calculate the sound, make the sound reproduction higher and the sound quality clearer. 4. USB2.0: Full digital decoding interface, chip power supply is safer, transmission is more efficient, and plug and play, no driver is required. 5. Anti Slobber MIC Sponge Cover: It can prevent saliva from spraying into the microphone, preventing dust from invading the microphone and affecting the recording effect. At the same time, it can also filter the noise and sound waves to a certain extent, making the sound source of the recording clearer. Specification: Item Type: Test Headset Product Material: ABS, PU Microphone: Mic Sizes: Approx.Ф9.7 x 4.5mm 0.4 x 0.2in Directivity: Super Cardioid Unidirectional Sensitivity: -50+-3db SN Radio: >55dB Impedance: less than 2.2K Ohm Microphone Pole Length: Approx. 23cm 9.1in Speaker: Diameter: Approx.Ø40mm 1.6in Impedance: 32 Ohm +-15percent Power: 100mW Frequency Response: 20Hz-20kHz Output Sound Pressure (S.P.L): 96dB+-3db Plug Type: USB2.0 High Speed. Package List: 1 x Headphone