Due to the busy work and increasing pressure, we have evolved from enjoying music in static environment indoors to using portable playing tools to bring music with us. Portable and small is the universal advantage of headphones. However, compared with traditional speakers, the damage to hearing caused by headphones is inevitable. Generally speaking, the loudness exceeding the hearing limit of human ears will cause hearing damage. Marked by "decibels", simply speaking, too loud is not good. For example, we listen to music at 60% volume on the bus and listen to music at 60% volume in bed before going to bed. Why? It is because environmental noise makes our ears feel that the volume of 60% lattice is "very small", but music itself is not really small because you think it is small, it is objectively still 60% loudness. At this time, if we turn the volume up to 50% or even 60%, although it feels as clear as usual, how much stimulation should our tympanic membrane suffer? We know. Headphones are usually divided into three types: head-mounted, ear-hung and inear, among which the two types with the least damage to ears are head-mounted and in-ear. The advantage of in ear headphones is that they are close to the ear canal, which can isolate the external noise as much as possible and reduce the environmental noise as much as possible. However, in terms of sound effects, ordinary inear headphones cannot improve, and inear headphones that can really restore the real sound effects are ridiculously expensive. Headphones, though not small and portable, surpass in-ear headphones in price and sound effect. For example, in the sound field, the in-ear head effect is obvious, it is impossible to construct a complete sound field, and the best sound field in the in-ear type is no better than a headset with a cost of about 1,000 yuan. The same is true for low frequency. Everyone who has heard of good speakers knows that a considerable part of low frequency is felt by human body, not ears, so even the head-mounted type can't be the truest, and the inear type can't be done even more. Therefore, after fully considering many factors such as health, price and sound effects, I think headband one are better.