Bluetooth headsets, which are widely used in the current market, actually apply Bluetooth technology to hands-free headsets, use high-precision sound quality microphone configuration, so that users can use audio products conveniently and quickly, and freely in various ways. Voice calls. After the advent of Bluetooth headsets, the market share soared rapidly and was well received by customers, especially in the business field.

Bluetooth technology is a low-cost and high-capacity short-range wireless communication. The microphones produced and developed are widely used in bluetooth notebook computers, which are notebook computers with bluetooth wireless communication function. In 1995, the Bluetooth specification adopted the microwave frequency band to work, with a transmission rate of 1M bytes per second and a maximum transmission distance of 10 meters. The transmission power can be increased to 100 meters. Bluetooth technology is open globally and has good compatibility worldwide. The whole world can be connected through a low-cost invisible Bluetooth network.

Specifications of Bluetooth headsets: HSP, HFP, A2DP As for purchasing Bluetooth headsets, because there are many brands of mobile phones and headsets, the most troublesome issue for consumers is the compatibility of microphones and related parameters between mobile phones and Bluetooth headsets. . Bluetooth headsets have three specifications: HeadsetPro-file (HSP), HandfreeProfile (HFP) and A2DP. HSP provides the basic functions required for communication between mobile phones (mobile phones) and headsets. HandfreeProfile (HFP) adds some extended functions on the basis of HeadsetPro-file (HSP). Originally, it was only used to control mobile phones by fixing the car hands-free device from the Bluetooth headset. A2DP (Advanced Audio Transmission Specification)-allows the transmission of stereo audio signals. (Compared to the mono encryption used for HSP and HFP, the quality is much better).

Determine the compatibility of the headset and the mobile phone. Among them, the Bluetooth headset in HFP format supports more complete functions of the mobile phone. Consumers can operate the hands-free options such as redial, call retention, and call rejection on the headset at the same time. Take the Bluetooth headsets launched by several major manufacturers such as Nokia, Motorola, Sony Ericsson, and QCY as examples. Almost all of them support the HFP format. Pymet supports both HFP and HSP at the same time. Consumers should pay special attention when purchasing.

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In addition, when consumers purchase Bluetooth products, they often encounter the problem of how to choose the Bluetooth technology version. Different Bluetooth versions and different microphone configurations are related to the quality of the received signal and the sound quality. The new version is stronger to overcome noise interference, and all the latest versions of Bluetooth are designed to be backward compatible with all previous versions. Devices of version 2.0 and version 1.1 can also be connected freely. 3.0 is more compatible and is a relatively mature technology. Bluetooth 4.0 is also a high version compatible with a low version, and the battery life has also been increased due to technical tips. Consumers should weigh the price and demand when purchasing.

The use distance of the Bluetooth headset: not only depends on the headset. Another important decision point of the Bluetooth headset is the transmission distance, which has nothing to do with the Bluetooth version, but depends on the Bluetooth technology PowerClass. Most mobile phones and mobile devices use PowerClass2 with a standard transmission distance of 10 meters. The upgraded PowerClass1 increases the transmission distance to 100 meters. Both versions support the A2DP stereo transmission protocol and can be interconnected with stereo headsets. Generally speaking, the distance between the mobile phone and the Bluetooth headset is not too far. If there is no big obstacle in the middle, the transmission quality is very good within 7 meters, and there will be a break point if it exceeds 8 meters! The connection between Bluetooth devices over 10 meters will be lost.

According to the actual feeling of use, the distance between the mobile phone and the Bluetooth headset is proportional to the noise of the call; in addition, when using a stereo Bluetooth headset to enjoy music, do not be too far away from the mobile phone, otherwise intermittent phenomena will easily occur. There are many consumers who hang Bluetooth headsets on their ears at any time, so the shape becomes the basic condition; and everyone has different ear shapes, users have to try the wearing comfort before buying, and then decide to buy; people who wear glasses It is also important to note that the ears of many Bluetooth headsets will conflict with the temples. You must try to find out.