Views:6 Author:Site Editor Publish Time: 2018-03-23 Origin:Site
Bluetooth speaker, Actually refers to speakers that rely on Bluetooth transmission agreement for data transmission. Since most mobile devices (mobile phone, notebook, tablet) Both have Bluetooth chips. No need the cable or audio cable connection can be quickly identified,simple operation and easy connection.
From the aspect of sound quality performance, the effective audio data volume of CD sound quality data (44.1KHz sampling rate, 16bit sampling accuracy) is about 1.4Mbit. To transmit CD sound quality music signals, the transmission rate can be achieved only at 2Mbit per second, Bluetooth The "2.1+EDR" specification is sufficient. Moreover, since these products tend to follow the mature acoustic structure of traditional sound boxes and achieve wireless playback after the Bluetooth module is integrated, the sound quality is equivalent to that of the same level speaker products. From the specification point of view, although Bluetooth 3.0/4.0 Standards have been proposed, but the former is mainly reflected in the Bluetooth radio frequency modulation to Wi-Fi On par, the latter is reflected in automatic power control.
The application, that is, low power consumption, reflects the progress of Bluetooth technology from these two versions, but has little connection with audio applications. From the chip level application, it is suitable for 3.0/4.0 version.
The transmission distance of the Bluetooth speaker is independent of the Bluetooth version and mainly depends on the advanced level of technology. In general, the distance between the mobile phone and the Bluetooth speaker is not so far, and the relatively safe transmission distance is within 10 meters. Bluetooth speakers in the market reach the standard of 10 meters.
The Bluetooth digital speakers have built-in batteries and are truly wireless. The quality of the built-in battery directly determines the playback time and service life of the Bluetooth digital speakers. Please inquire about the actual playback time and repeated charge decay times before purchasing. It is suggested that consumers choose lithium polymer battery as much as possible when choosing Bluetooth Bluetooth speaker, no risk of explosion.
About Battery type:
1) Polymer battery
Advantages: safe and efficient, soft package no explosion hazards.
Disadvantages: Variety of types, pure cobalt (good) and pure manganese (poor) polymer battery difference several times.
2) 18650 Battery:
Advantages: excellent performance, can reach the highest level of charge and discharge (used in laptop batteries), there is protection against explosion
Disadvantages: disassemble battery and old batteries are more. The same 18650 battery good and bad bad 5-10 times.
3) Aluminum shell battery:
Advantages: The price is cheapest.
Disadvantages: poor performance. Without any explosion protection measures, the consequences of an explosion can be disastrous.
Battery protection board:
1) The battery protection board of the brand-name battery is relatively poor in charge and discharge protection, and unstable and easy to damage the battery core and electronic equipment.
2) Unstable current output not only affects the sound quality, but also causes a large current sound. After a good quality battery is charged and discharged 500 times, it can reach 80% of the initial capacity. Poor quality batteries do not even reach 50% of the initial capacity after 100 charge and discharge times.
Bluetooth speaker classify:
1) the first sort:
Single speaker mini portable
The mini portable Bluetooth speaker is mainly divided into a speaker, single speaker, single bass radiator, single speaker, an inverting hole, and single speaker diaphragm. In function, it is mainly divided into common single-bar mini Bluetooth speaker and outdoor mini bluetooth speaker, etc.
Ordinary monocular mini bluetooth speaker
The Bluetooth speaker's initial stage was the most prosperous with this simple single-tube Bluetooth speaker.Due to its simple structure and without special technical support, it attracts a large number of manufacturers. Since the price lowest, it is very popular with people who have just touched the Bluetooth speaker. For a while, there are numerous such speakers on the market. For people to know and be familiar with the Bluetooth speaker has made a lot of credit. However, due to the constraints of its sound chamber cavity, excessive product homogeneity, and low price, it is difficult to make breakthroughs in speaker sound quality, and the battery life is relatively short, most of which is between 2 and 3 hours. The use of speakers is very limited, and most of them can only be used in a fixed place. Most of its users do not require sound quality, so the inexpensive single-segment bluetooth speakers are easily available for purchase.
As the ordinary mini Bluetooth speaker is difficult to meet the requirements of the outdoor environment, so outdoor mini Bluetooth speakers is coming. It’s wireless, portable can use in at home or outdoor. Can reach the basic waterproof and drop-resistance requirements can meet simple outdoor sports, but also due to the limitations of the small size, the sound quality can not have a big breakthrough, Can only be a breakthrough in portability and waterproof and anti-fall, Life is usually only 3 to 5 hours of battery life can only be short-lived outdoor activities.
As a transitional product for outdoor Bluetooth speakers, the price is relatively cheap. The main advantage of this type of speaker is that it is compact, portable, and portable, but the other side that comes with compactness is the sound quality, poor bass, and short battery life.
The second category: The perfect combination of dual horn sound quality and portability
This Bluetooth speaker has two speakers, two speakers + one diaphragm, two speakers + inverting holes, two speakers + two diaphragms. In terms of function, it is mainly divided into mini home-style Bluetooth speakers and outdoor sports Bluetooth speakers.