Bluetooth microphone and speaker netizens recently selected the impact of China's educational development over the past three decades, 10 technology product list, where the wireless microphones because most teachers are welcome and among the first wireless microphones will not only help students improve the lectures , but will also alleviate the problems of the education sector for many years, "laryngitis" and other occupational problems of teachers. The current mainstream products JBL wireless microphone used in the classroom and EV speaker design innovations, most of the VHF FM, UHF PLL-based FM analog signal transmission. Let's look at the microphone used in teaching some of the problems that exist in practice BOSE speaker technology patents, which you can see the direction of development for wireless microphones used for teaching. Immunity: The traditional V / U-band frequency due to the limited number of communication between the wireless microphone and the matching receiver, and radio waves penetrating sound, it is prone to crosstalk between adjacent devices signal each other phenomenon. Speaker adjacent classroom or between the upper and lower floors of classrooms is likely to spread to other classrooms voice. Since the conventional wireless microphone is an analog signal propagation, the same frequency band susceptible to noise interference to other radio waves. GM: Since the transmitter and receiver frequency correspondence, so the microphone in the school specially matched to manage, as far as possible the use of different channels of the microphone circulated adjacent classrooms, it is not among the set of microphones to each other universal. Even for microphone FM points before using the channel should be adjusted to the other microphone unused channels. Electromagnetic radiation: the part of the product for wireless transmission power of 30 mW or more, to consider a long period of strong electromagnetic radiation environment have an impact on teachers' health. Environmental issues: they use a battery-powered wireless microphone mode, power consumption is large due not only require frequent replacement of the battery, and the battery abandoned after the destruction of the ecological environment will generate. Sound engineer needs to hear the voice of the nature of indoor and outdoor speakers buy, so he was able to know how the sound was modified in order to ultimately achieve perfection, if you start to hear is through additional "modified" over the sound, so no one can guarantee the final product would look like. So in this sense, the monitors may not be the most suitable for users who listen to music with the speaker, because the design concept requires that it must pursue the source of the original as a starting point, you can not add any style, personalized sound Voice rendered indoor and outdoor speakers buy | Speaker | Wuhan Wuhan Jiuhua Jiuhua video provided by the video Engineering Limited. Video Jiuhua Wuhan Engineering Co., Ltd. (www.jowa-tech.com) strong, credible, in Wuhan of control and adjustment equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving Jiuhua Wuhan innovative ideas will lead into the brilliant video and you work for a better future!