How to look at the configuration of the headset, how to look at the configuration of the Bluetooth h

The main parameters of the headphones are sensitivity, frequency response range, impedance and transducer mode.

1. Sensitivity, which reflects the amount of power that needs to be input under the same loudness. The higher the sensitivity of the headphones, the less input power is required, and the louder the sound output is at the same power source.

2. The frequency response range refers to the range of sound that the earphones can show, the frequency response range of ordinary earbuds is about 20Hz-20kHz, and the frequency response range of the earphones will be larger.

3. Impedance refers to the resistance of the earphone itself, the smaller the impedance, the easier it is to drive the earphone, and the greater the impedance, the more difficult it is to drive. Headphones with too much impedance will sound a little mixed, and headphones with higher impedance will sound better when paired with a source with high output power.

4. Classification of energy conversion methods: mainly moving coil type, electrostatic type, and moving iron type.

In fact, the parameters are just a reference.

As for the sound quality of the headphones, you still have to feel for yourself whether it is really suitable for you. It is recommended that if conditions permit, go to the experience store to experience it for yourself.

HiFI Class Entry Headset EP-21

The HD features a new diaphragm design and improved cavity, resulting in a very clean and balanced tri-frequency performance. At the same time, EP-21

The HD has the highest 128 ohm impedance of any earbuds in the world. 4 times stereo hearing, 2 times the bottom noise drop, 2 times the naturalness of the sound, the comprehensive strength is very good.

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What about Meizu EP21HD headphones? Meizu EP21HD headphone configuration.

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1. Turn on the Bluetooth headset.

The first device to turn on should be a Bluetooth headset, and the way to open it is generally to press and hold the switch of the Bluetooth headset, and wait until the indicator light is on, and then let it go immediately. The flashing of the indicator light.

It means that it has been turned on, and some may be a traffic light display, red light means off, green light means on.

2. Turn on your phone's Bluetooth.

3. Connect the Bluetooth headset to the mobile phone.

After both devices are turned on, you can connect to Bluetooth, the connection method is to search for other Bluetooth devices through the Bluetooth interface of the mobile phone, click to it, search on the line, and then it may search for a large number of Bluetooth devices (if there are many people around), find the name of your Bluetooth headset (generally displayed is the brand and model of the Bluetooth headset), click to connect and wait until there is a "drop" sound in the Bluetooth headset, and the indicator light lights up to indicate that the connection is successful.

Go and choose your song,The **** device of the mobile phone is generally easy to find,Find the **deviceClick to enter,Select the song**OK,At this time, it may prompt whether it is through the voiceover or headphones**,This is the corresponding control click to select through the Bluetooth headset**OK,Then you should be able to hear the song in the Bluetooth headset。

5. Appreciation.

After listening, you should turn off your ** device and two Bluetooth, generally it is better to turn off the Bluetooth of the mobile phone first, because if you turn off the Bluetooth headset first, it is very likely that you forgot to turn off the Bluetooth of the mobile phone later, so it is recommended to turn off the Bluetooth of the mobile phone first, and the specific operation method is to go in again according to the previous mention, click to turn off the Bluetooth, and then press and hold the Bluetooth headset on/off key, and wait until the red light flashes to mean that it is turned off.

How about listening to songs with Bluetooth headphones.

There are 2 types of Bluetooth headsets, one is an ordinary headset, that is, a call**, when a hands-free device is used; The other is stereo headphones, which can not only be called, but also listened to. Bluetooth headsets are more or less subject to clutter interference to introduce noise through wireless transmission, so the signal-to-noise ratio of the signal.

Still worse than wired headphones.

Select the headphones to see the frequency response parameter range.

After compensating for the curve, almost no headphones can reach 20-20k Hz + 3db (except for a few expensive static electricity). And earbuds, do 20-20k Hz + 5db are almost none. The recently launched in-ear headphones NS5 "Dream Bridge", the prototype can do 10-20K Hz + 5dB, which is already a remarkable parameter.

If the range is not marked, the NS5 can achieve 4-50K Hz, which is far beyond the hearing range of the human ear.

The frequency response range of headphones is of little significance because almost all manufacturers do not specify the allowable error range (i.e., flatness requirements). In this regard, the speaker industry has a lot of specifications, and almost all manufacturers have marked the frequency response range of +-3db in the anechoic chamber, so the parameter reference is much stronger. However, Japanese and some small speaker brands often play a side game, marking the frequency response range of +-6db or even +-12db, and even not writing the error range at all, and their power standard pmpo (peak) power, it has become a joke for burners who know a little bit.

Many earphone enthusiasts see that the frequency response range of headphones is basically more than 20-20k Hz, and they take it for granted that the frequency response of headphones has exceeded that of high-end speakers, but in fact, this is just a layman's understanding. If you really want to mark the frequency response in the +-3db range, most headphones can't even do the 100-10k Hz range.

Parameters to pay attention to when buying headphones:

1. Impedance: pay attention to the difference between the meaning of resistance, in the field of direct current, the effect of the object on the current obstruction is called resistance, but in the field of alternating current, in addition to the resistance will hinder the current, the capacitance and inductance will also hinder the flow of the current, this effect is called reactance, and the impedance we call daily is the sum of resistance and reactance in the vector. The unit of headphone impedance is ohms, generally speaking, the lower the impedance of the headphone, the higher the sensitivity, the easier it is to drive and the easier it is to sound.

2. Sensitivity: the sound pressure level that the earphone can emit when the earphone input 1 milliwatt of power, the unit of sound pressure is decibels, the larger the sound pressure, the greater the volume, so the higher the general sensitivity, the smaller the impedance, the easier the earphone is to make sound and the easier it is to drive.

3. Frequency response: the sensitivity value corresponding to the frequency is the frequency response, and the frequency response curve is drawn into an image, and the range that human hearing can achieve is about 20 Hz to 20,000Hz, and the current mature headphone technology has met this requirement.