- Contact Person : Ms. Zhao Mayling
- Company Name : Shanghai Zhongchangjiang Telecommunication Technology Co., Ltd.
- Tel : 86-021-58226122
- Fax : 86-021-68221183
- Address : Shanghai,Shanghai,No.5829 Hunan Road Pudong New area, Shanghai
- Country/Region : China
- Zip : 201316
Earphone&headphone
Ear plugs of FC Changjiang radiation-proofing earphones are far away from loud speakers with 200-300mm acoustic lines to separate loud speaker magnetism and radiation source. Common earphones’ loud speakers are in earplugs. Radiation through conductor will be absorbed by brain; 1000Gs permanent magnet in ear plugs is harmful for our brain.
Ear plugs of FC Changjiang radiation-proofing earphones are connected with phones by an anti electromagnetic wave acoustic channel. We can produce radiation magnetic field to under 2mG which has no harm to human body.
Operating phone calls by switch board in earphones is to keep us a certain distance from phones.
FC Changjiang radiation-proofing earphones cannot be used as aerial line for signal receiving to avoid radiation caused by aerial line.
• New generic Universal 3.5mm/USB plug which can be made as required
• n-Ear Stereo& Mono Headset
• Modals FC01 FC02 FC03 FC04
• Colors White, black, red, blue
• Includes integrated earpieces and microphone
• Excellent sound quality and super clear sound.
• Length: 145 cm (57 inch)
1.Electret condenser microphone
Offset | 4.5VDC 2.2Kilohm |
Sensitivity | —42±3dB f=1KHz,spL=1Pa |
Directivity | omni directional |
Static impedance | 1—2.2 Kilohm |
Peak voltage | 10VDC |
Distortion Speech to noise ratio | at 400Hz and 1kHz less 5% more than 58dB |
2.Horn
Sensitivity
| 114±5Db SPL/3Mw/5cm at 1KHz
|
Rangeoffrequency
| 20Hz—20KHz
|
Resistance
| 32Ohm±15%
|
Rated power
| 3mW
|
Capacity
| 5mW
|
Lead wire length
| 1-1.5m
|
Earphone&headphone