Bone conduction earphone

QDC Tactical Communication headphone is a high-tech product based on bone conduction technology, which solves the problem that the interphone can not communicate in high noise environment. The traditional communication products use air as the transmission medium. In the high noise environment, the voice of the interphone has been completely submerged in the noise, so it is impossible to communicate. Bone conduction communication earphones, using whole bone conduction and DSP technology, do not need air as a transmission medium to speak and listen to, completely by the facial bone vibration to transmit sound, the greatest extent to shield the noise, you can receive very clear sounds even in noisy environments without affecting the ability to hear the sounds of your surroundings. Bone conduction communication headset unique advantages, especially suitable for fire fighting scene, government celebrations, mass meetings, large-scale sports events, concerts and other occasions under the use of disaster relief, security.

The product consists of two parts, namely, headset and large key control box. Headphone technology uses bone conduction technology based on facial bone vibration sound transmission, including bone conduction horn and bone conduction microphone, when using the Horn and microphone close to the cheek. The overall design is strong and durable, heavy and masculine.

Technical parameters whole bone conduction: bone conduction horn + bone conduction microphone, send and receive bone conduction sound distortion is small, high degree of reduction, can clearly distinguish the speech of familiar people. Design of cable release device: Φ4.2 mm black spiral tensile cable is used for connecting cable, and 7-core safety release device is used for connecting plug, which can ensure quick release in emergency and guarantee the safety of users. : : Ergonomic design: The fixed steel clip can be freely adjusted (with 13 limit points on each side) and the top band can be retracted or retracted at will to suit the different head shapes of different users; the bone conduction Horn makes use of the natural tension of the spring, close to the facial bones while ensuring comfortable, reliable, long-term wear, and does not affect the use of helmets, air breathing apparatus, gas masks and other protective equipment. The speech and the sound does not take the air as the transmission medium, guarantees in the high noise environment the communication is clear, when the sound listens leaks is small, has the good confidentiality. The ears are open so that the user can listen to the sound of his surroundings. The broad PTT button is designed to free the user’s hands. When the user’s hands are occupied (such as holding water gun, stretcher, etc.) , the elbow can be used to press the PTT to realize normal communication. Equipped with independent battery, no consumption of walkie-talkie power, a new battery can be used continuously for at least 80 hours, standby time more than 20 days, not limited to walkie-talkie models, can match almost all the walkie-talkies on the market. Specially designed tactical back clip with 360 degree rotation for flexibility, simplicity and durability. Specification: Sensitivity (1 Khz)0.141 VRMS (0.1 mw) : 77 ± 3 DB (DB re 1.0 dyne) nominal impedance: 20 ω ± 20% (1 KHZ) DC resistance: 10 ω ± 20% nominal power (1 KHZ)0.774 VRMS (30 MW) : 91.5 ± 3 DB (DB RE 1.0 dyne) Thd: & Lt; 5% maximum power (1 KHZ)1.183 VRMS (70 MW) : 95.2 ± 3 DB (DB RE 1.0 dyne) Thd: & Lt; 10%
Bone conduction horn specification: bias voltage: 1.5 v Sensitivity (Re 1v/1g acceleration, 1 Khz) :-39DB (re 1.0 v/g) output impedance (1 Khz) : 5200 ± 300Ω (frequency dependent) maximum operating current: 50uA

Hidden communication earphone specification parameters maximum volume output@3khz: 110DB FREQUENCY RESPONSE: 300 ~ 3600HZ signal processing mode: Electret noise filtering mode: hard suppressed battery signal: Znq2a10 Battery working time: 100HR low voltage alarm/boot Beep:/-SIGNAL-TO-NOISE RATIO: & Lt; 45DB STORAGE TEMPERATURE:-20 °C to 70 °C operating temperature: 0 °C to 40 °C Size: 5 * 10 * 15mm weight (including battery) : 1.1 G COLOR: Beige Wireless Remote Control Function (Optional) : High Imitation car key appearance, strong camouflage and confusion; volume increase and decrease and mute; Remote Control and receiver box matching; Battery Voltage Detection Function; Nfmi near Magnetic Field Technology;

NFMI BATTERY MODEL: CR2450 BATTERY LIFE: Greater Than 1Year Operating Distance: 60cm to 150cm volume control: 6steps Key Life: & Gt; 100000 bottom voltage alarm: LED pairing method: Manual Operating Waterproof requirement: IP67 ADAPTER & PTT AMP; Induction Coil parameters (integrated coil or SATCHEL concealment) color: Skin Color impedance: ≥40 ω (FREQ: 300 hz ~ 1 Khz) ; ≥130 ω (Freq & GT; 5 Khz) length: 65 cm, with self-release device most with input signal: 3.5 VRMS POWER SUPPLY MODE: Duel Power Supply (from radio or Batt) power supply voltage range: 3.3 V to 10V

Microphone Parameter Model: Omnidirectional impedance: 4.4 kω at 1 Khz luminosity@1 Khz (DB RE 1.0 v/0.1 PA) :-53.0 ± 2 DB FREQUENCY RESPONSE: 100 hz ~ 10 Khz maximum operating current: 50 UA SUPPLY VOLTAGE: 1.5 V ~ 10 v Temperature Range:-10 °C ~ 60 °C

Digital Covert Earpiece is a high-performance, all-Digital, adaptive noise reduction, micro wireless Earpiece. Characteristics of digital covert communication earphone: Bone conduction earphone consists of earphone, integrated coil and remote controller. Headset with no less than DC1.45V Battery Power and interphone can achieve two-way voice intercom output distortion, 1KHz not more than 5% , 1.6 khz not more than 5% ; 2.5 Khz not more than 5% the remote controller and the integrated coil can communicate with each other when the code is completed. The volume adjustment function is not lower than the fourth gear. After holding down the mute key for 3S, the remote controller can enter the mute mode. After holding down the mute key for 3s, the mute mode can be removed The remote control is immersed in 1m deep water for 30 minutes, and works normally. The 4-core microprocessor digital signal processing (DSP with 4microprocessors) system, through the application of advanced intelligent noise reduction algorithms, automatic identification of environmental noise and implementation of 32 Khz sampling and 128 frequency-point high-resolution real-time effective noise reduction. This eliminates all types of noise efficiently and ensures natural speech articulation. The electromagnetic interference (EMI) caused by automobile engine ignition device, transmission line and many other electronic and electrical equipments is reduced through effective noise-reducing function algorithm and advanced hardware design.When the audio signal is weak or non-existent, the quiet system puts the headset in a standby state, in which the headset has no sound output. 4 Channel Wide Dynamic compression, High Fidelity 20 bit audio processing, 93 db dynamic input range 8 band Digital filter, according to user preferences to adjust the magnification at different frequencies; With variable threshold, Time constant and adaptive release time automatic volume control (AGC) , intelligent maximum output volume limiter to ensure user’s comfort when listening to high volume, 16 khz bandwidth, low voltage prompt sound alarm; Mini earphone, suitable for right or left ear at the same time; CE, FCC certification, get the Ministry of Public Security Test Report, Chinese Academy of Sciences Test Report. DIGITAL COVERT COMMUNICATION EARPHONE SPECIFICATION MAXIMUM VOLUME OUTPUT@3KHZ: 110DB FREQUENCY RESPONSE: 300 ~ 3600HZ signal processing mode: Electret@DSP noise filtering mode: Soft Squelch Battery Signal: ZNQ2A10 battery working time: 100HR low voltage alarm/boot prompt: BEEP/--,SIGNAL-TO-NOISE RATIO: & GT; 45DB STORAGE TEMPERATURE:-20 °C to 70 °C operating temperature: 0 °C to 40 °C Size: 5 * 10 * 15mm weight (including battery) : 1.3 G COLOR: SKIN TONE: CE/FCC ADAPTER & AMP; Coil parameters (integrated coil or SATCHEL concealment) color: Skin Color impedance: ≥40ω (FREQ: 300Hz ~ 1KHz) ; ≥130ω (Freq & GT; 5KHz) Length: 65cm, with self-release device most with input signal: 3.5 VRMS POWER SUPPLY MODE: Duel Power Supply (from radio or Batt) power supply voltage range: 3.3 V to 10V Note: The Coil Interface and control box scheme is determined by the Intercom interface, the appearance is slightly different

Microphone parameters: MODEL: Omnidirectional impedance: 4.4 K ωat 1 khz clarity@1 Khz (DB RE 1.0 v/0.1 PA) :-53.0 ± 2 DB FREQUENCY RESPONSE: 100 hz ~ 10 KHZ maximum operating current: 50 UA SUPPLY VOLTAGE: 1.5 V ~ 10 V temperature range:-10 °C ~ 60 °C wireless PTT Remote Control Function (Optional) : High Look Car key, strong Camouflage and deception; volume increase and decrease and mute; remote control and receiver box pair; Battery Voltage Detection Function; Nfmi near magnetic field technology.

Remote Control Specification: Wireless Technical Specification: NFMI BATTERY MODEL: CR2450 BATTERY LIFE: Greater Than 1 Year Operating Distance: 60cm to 150cm volume control: 6steps Key Life: & Gt; 100000 bottom voltage alarm: LED pairing method: Manual operating waterproof requirement: IP67

Colors and styles can be customized