How to Estimate Headphones

Except for the outlook and comfortableness of material, the most important element is sound effect, it also means, the good quality of the electronic component and structure.

As good sound headphone can bring pleasure as well as protecting man’s ear, it gets essentially important to get good ones.

How to judge the sound?

Let’s pay attention to:
Solid sound: the tone is full
Sound is clear and pure, no noise
Good balance, nature and pleasure
Effect of frequency of high, mid and low should be wide range, vivid, real and not harsh
Good definition: sensitive and detectable to the micro tiny change of sound signal.
Sound field: Being wide and descriptive, not empty or hollow
Natural speed: to set volume at max does not lose the real.

A wider frequency range means you can hear more from the music; large ranges such 10 Hz to 25,000 Hz will often be recommended - anything within that range will be fine.

Notice the sound curve, frequency response curve and sound signature, whatever you want to call it. If the low end is higher on the line graph, there will be more bass. This does not mean that the bass will be more precise or better. For example, Beats headphones tend to be very bass boosted, yet the bass is commonly described as muddy and boomy with no precision.

Typically, most headphones under $100 will have a U curve - meaning the mid-range is cut out. They may sound "fun" and pleasing to the ears at first, but you won't be able to analyze the layers of music easily. Flat response headphones don't favor any range, meaning you'll hear every layer of the music equally. However, the first impression if you're used to U curves is usually "these have no bass" or "they sound boring". Most people just need to grow into that sound signature to enjoy it.

To summarize, generally an open environment earphone will be healthier on protecting the ear. For all headphones, it’s important to take good sound.