Back headphones

الوصف

Product description：
When you feel bored, sleepy or want to listen to music, you cannot listen clearly with ordinary headphones due to the roar of plane engine. At this time, you need a pair of earphones with good noise reduction effect, but this kind of earphones ususally cost high. However, the aviation earphones specially designed by us have low price, high-end sound quality and noise reduction effect. We did it!
The crystal-like clear tone has excellent alto voice, high-pitched voice and bass. With outstanding and meticulous resolution, the headphone reproduces instrument of different tones and is particularly outstanding to human voice. All products are integrated, preventing the earphone from damage and breakage. Our headphones are all aviation headphones, supporting common digital equipment and aviation interface. The headphones may be custom built, with LOGO printed on it. Just inform us your requirement and we will do it for you. 




Specification:
Impedance: 32Ω/300Ω
Cable length: 1.2 m
Plug diameter: 3.5 mm
Plug type: direct plug, L bend plug, fixed double plug; folded plug
Sensitivity: 95dB-110dB
Audio: 200Hz-20000Hz
Headphone output audio source: portable music & video player
Wired or wireless headset: wired
With microphone or not: no
Vocalism principle: moving coil

Normal use method:
1. Use the headphones for 12 hours to 24 hours with 1/3 volume of the normal audition strength;
2. Use the headphones for 12 hours with 2/3 volume of the normal audition strength;
3. Use the headphones for 72 hours with the volume of the normal audition strength;
4. Use the headphones for 24 hours with 3/4 volume of the normal audition strength;
5. Enter normal use phase;
6. The volume shall not be too loud during normal use and should be kept at 2/3 of the maximum volume;
7. Put off the headphones during sleep to avoid damage;
8. The above-mentioned is the recommendation of headphone burn-in. You may do it based on your own requirement. 

Tips:
1. Please select high-quality earphones;
2. Please adjust the volume to 40-60 db (general conversation or slightly lower voice, with soft not harsh voice is more appropriate). Do not increase the volume for the pursuit of stimulation so as to avoid excessive stimulation and hearing damage;
3. Take off the headphone for a few minutes each time per half an hour to avoid accident;
4. Please do not listen to music with headphones when you ride, take bus or walk to avoid accident; 
5. Please stop using the headphones for a while in case of dizziness, earache and ramming. 
6. If you have tinnitus (such as cicadas, sirens, metal sound, etc.), and progressive hearing loss, please go to the ENT Department of hospital for diagnosis and treatment because this is very important to prevent deafness.