There are two types of headphone jack standards, one is the American standard, one is the European standard, the iPhone uses the American standard interface, to buy headphones as long as you buy this kind of interface headphones.
And even if the interface is different, there are interface adapters on the market, but the quality of the adapter will affect the sound quality. Like Nokia is the European standard. Now the computer audio, headphones, headset is basically used in the 3.5mm interface.
Generally 3.5mm, Motorola cell phones, there is a headset hole is 3.5mm below.
Extended information:
Because headphones are much smaller than the average external headphones, they can be used in a variety of ways. p>Since headphones are closer to the inner ear tissue than normal external noise; users have to take the necessary protective measures. Studies have shown that pleasant music causes less hearing damage, but prolonged exposure to high decibel sounds, whether music or noise, can cause hearing damage.
The sensory nerve hearing damage that can be triggered by noise occurs in the inner ear, when high-energy sound waves soup up the fluid in the cochlea, overstimulating and causing cell death. Hearing damage occurs over time, and prolonged exposure to noise, even for short periods of time, can cause hearing loss.
A survey published in the Journal of the American Medical Association in 1998 and experiments at Shanxi Medical University in China showed that prolonged exposure to high noise levels had a negative effect on hearing.
If you use headphones on the street, you will not only have to turn up the volume, which can cause hearing damage, but also focus on listening to music, which can easily make users lose their alertness to peripheral sounds and increase the chance of danger, and is not suitable for children.
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