We will find that many people usually take out headphones to listen to music in public transportation, subway, or on the plane. In this noisy public environment, people wearing ordinary in-ear headphones will unconsciously lower the headphones. The volume, the invisible high volume causes hearing damage. You can try it on the way home from work at night, listening to music at the same volume in the room and in the subway, the size of the sound will definitely scare you.
The impact of noise on hearing is a cumulative, undetectable chronic injury. Listening to music in such a noisy environment as subways and buses will inevitably increase the volume, especially in a relatively closed environment such as the subway, which will put some pressure on the ears. Wearing headphones, high-intensity sound hits the eardrum, causing great damage to the hair cells in the cochlea.
The volume output of the earphone is generally around 84 decibels, and some high frequency ranges can reach 120 decibels. The sound is too large, and the time of each listening will affect the auditory nerve, causing excitotoxicity, and the autonomic nerve function will be disordered, except for tinnitus. Severe can also lead to anorexia, insomnia and other symptoms. Among all the noise, pulsed noise, like the sound coming out of MP3, has the greatest damage to hearing.
In order to make our ears healthier while listening to songs, I will introduce you today to Harman Kardon's new active noise reduction in-ear headphones with built-in microphones-harman/kardon SOHO II NC. The headset has a 35-hour noise reduction time and can be used as a normal headset when turned off or without a battery. In addition, the headset features a patented Freebit ergonomic design for comfortable wear. Sex and firmness are combined. Let's take a look at the Harman Kardon SOHO II NC Active Noise Cancelling Headphones!
Harman Kardon SOHO II NC active noise canceling headphones are made of light and environmentally friendly paper packaging, and the appearance also follows the Harman Kardon brand's consistent style, simple and elegant black and white. In addition, the accessories in the package are also very rich, including Three pairs of different sizes of Freebit ergonomic earplugs, in-ear earphones, a 3.5mm four-section plug wire and MicroUSB, carrying case and aviation adapter.
Tip: Harman Kardon is very intimate with a black and white wire, which can meet the requirements of various wire standards, which greatly improves the compatibility. Apple users can directly use the black model, Android users according to different Model equipment also needs to be tested by yourself.
The Harman Kardon SOHO II NC active noise canceling earphone uses a delicate metal casing in the cavity. The details are very delicate. The earphones are decorated with black lines on the outermost side, which is simple and fashionable.
The Harman Kardon SOHO II NC Active Noise Cancelling Headphone introduces the patented Freebit ergonomic design with a unique curved shape. The conduit section is made of black plastic. It is also ergonomically designed with a certain angle of inclination. It fits the ear, is very strong and not easy to fall off. In addition, it also provides S, M, L three sizes of earmuffs to meet the needs of different users.
The earphones are made of rubber wire. The left side of the wire has a single button with wheat wire control, which is very close to the user's mouth. It is more convenient to use, and the sound effect of the call is also very good.
The front of the noise reduction box is a metal brushed panel with the Harman Kardon LOGO and noise reduction on the top. The left side is the MicroUSB charging interface and the 3.5mm inlet port. The right edge is the noise reduction switch of the headphones. There will be a green indicator light that will turn red when the battery is low, and will light when charging.
The Harman Kardon SOHO II NC active noise canceling headphone is equipped with a 9mm moving coil unit with a frequency response range of 12Hz-24kHz and an impedance of 32Ω. As for the SOHO II NC sensitivity, the noise is not the same when turning on and off. 107.5dB SPL/V, and 115 dB SPL/V when turned on.
The battery in the SOHO II NC active noise reduction module can last for nearly 40 hours. It can be charged through the Micro usb port, and the notebook USB port and charging treasure can charge the SOHO II NC.
The Harman Kardon SOHO II NC Active Noise Cancelling Headphone has a miniature microphone on the outside of the brushed stainless steel cavity, which can receive noise waves from the surrounding environment and transmit it to the internal digital circuit for analysis, and reverse the sound wave to achieve absolute drop. The effect of noise. So even if the outside voice is noisy, you can not be disturbed, only enjoy pure music.
In the audition session, the author used the iPhone 5s as the sound source, and the songs used the popular music type. The Harman Kardon SOHO II NC active noise canceling headphones have a strong sense of surround sound when the noise reduction is turned on, and the sound density is also very high. The effect is also in place. In short, it is very suitable for listening to pop music. When the noise reduction is turned off, the hearing of the Harman Kardon SOHO II NC will change slightly, the thickness of the intermediate frequency and the low frequency will change significantly, but the sound effect is still very impressive. Satisfied, the basic and Bose QC20i is at a level.
I usually need to take the subway on the way to and from work. The journey takes about an hour or so. I usually wear the white earphones that come with the Apple mobile phone. But because the commuters in the subway are crowded, Apple's white headphones are easy. It is squeezed out, and after the subway, the volume of the music will be unconsciously raised. After getting off the bus and going to a quiet place, the brain will feel a little dizzy, which is because of the damage caused by the loud volume to the ear.
Ordinary in-ear headphones are passive noise reduction, and external noise will still pass through your skin and periosteum to your ears, so we listen to songs in noisy places and unconsciously turn up the volume. Harman Kardon SOHO II NC active noise canceling headphones can isolate all the noise from the outside world. Wearing the Harman Kardon SOHO II NC can also isolate the outside noise even in the noisy subway. I heard it very clearly. Because the Harman Kardon SOHO II NC uses Freebit ergonomics, even if it is worn for a long time, it will not cause ear discomfort, and no matter how crowded in the subway, the headphones will not fall off easily. .
Summary: Harman Kardon SOHO II NC has advanced noise reduction technology, stylish appearance, and is also very portable. In addition, it also introduces Freebit ergonomic design, comfortable and firm, allowing users to immerse themselves in their music. In the world, it is not disturbed by outside noise.
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