When purchasing headphones, the following aspects should be considered:
Quality of products
Buying a Bluetooth headset should pay more attention to the quality and performance of the product, such as battery life, radiation level, etc. Generally, inferior or inferior Bluetooth headsets cannot be guaranteed in terms of workmanship or materials due to cost control. The product quality is poor, the actual use function data is very different, and the radiation dose is very high.
conversation quality
Because call quality is a basic parameter to measure the quality of a Bluetooth headset, in general, using a Bluetooth headset with a pole design, because the microphone is closer to the mouth, the call quality obtained is relatively better than other types of products.
Standby time
Because this is the same as the daily use of mobile phones, the longer the standby time of the earphones, the more troublesome charging can be avoided, which is also one of the standards for measuring the performance of Bluetooth earphones.
wearing comfort
Human ears are relatively delicate. If the ear hooks of the earphones are not made of good material, or there are some defects in the design, they will feel uncomfortable after wearing them for a long time. Therefore, you should check carefully before purchasing and choose a Bluetooth headset that suits your ear shape.
Why use
What are the main reasons for buying a bluetooth headset? It depends on what it is mainly used for – ① for language learning. Just choose a headset with a lower price, preferably the earmuff type with volume adjustment, ② for listening to the news. Ordinary electromagnetic earphones are sufficient. ③ Used to listen to music. To enjoy music in general, just buy a mid-range device, such as auscultation or dynamic headphones. If you want to enjoy high-quality music, you should buy high-fidelity headphones, such as high-quality dynamic, flat-film or condenser headphones, regardless of the price. Among them, the cost-effective BRD headphones are the first choice. ④Easy to use. The wireless bluetooth headset does not need to be connected and is extremely convenient to use. In addition, there are headsets with radio function, which allow you to listen to various languages and music programs at any time. ⑤ channel. Mono and dual-channel power amplifier equipment should be equipped with single-channel and dual-channel headphones respectively.
Compatibility
When buying a Bluetooth headset, the most important question is whether the phone is compatible with the headset. Some bluetooth earphones are not compatible with mobile phones, mainly because of different specifications. There are three main specifications of Bluetooth headsets – HandfreeProfile (HFP), HeadsetPro-file (HSP) and A2DP. HFP stands for Hands-Free Function while HSP stands for Headset Function. Consumers must first figure out which specifications their mobile phone supports, and then choose the right Bluetooth headset to pair with. A2DP refers to the Advanced Audio Distribution Profile, which allows the transmission of stereo audio signals with much better quality than HFP and HSP.
The Bluetooth headset in HFP format supports relatively complete functions of mobile phones. Consumers can operate hands-free options such as redial, call hold, and call rejection set by mobile phones on the headset. Almost all Bluetooth headsets support HFP format, and some models support both HFP and HSP.
Chip brand
There are three major chip suppliers of Bluetooth headsets, one is CSR in the UK, and the other is Broadcom in the United States. Broadcom’s products account for more than 80% of the market.
Transmission distance
The transmission distance of Bluetooth headsets is also a problem that everyone is more concerned about. The transmission distance of the Bluetooth headset has nothing to do with the Bluetooth version, but mainly depends on the advanced level of technology. The standard transmission distance of PowerClass2 is 10 meters; while the upgraded PowerClass1 increases the transmission distance to 100 meters and provides Hi-Fi stereo effects. Generally speaking, the distance between the mobile phone and the Bluetooth headset is not too far, and the safe transmission distance is about 2 meters to 3 meters.
Version
When consumers purchase Bluetooth headsets, they often see numbers such as Bluetooth 1.1, 1.2, 2.0+EDR, 2.1+EDR, and the numbers represent different specifications. At present, 1.1 is the most common, 1.2 is the new mainstream, 2.0 was launched in 2006, 2.1+EDR version, the latest is 3.0 is the mainstream, 4.0 is the latest Bluetooth headset technology, these numbers represent the different versions, but also represent the headset Anti-interference bluetooth headset capability. Different versions of Bluetooth are related to the quality of the received signal. The new version puts more emphasis on overcoming noise interference. All new versions are backward compatible, and consumers should measure price and demand when purchasing.
shape
In addition to functional considerations, the appearance and wearing comfort of Bluetooth headsets are also the keys that consumers must pay attention to when purchasing. Each person’s face shape is different, and users should try the wearing comfort before purchasing, and then make a purchase.