更新時(shí)間：2022-09-15
文章來(lái)源：http://www.djfrj.net.cn/
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在我們身邊有各種各樣的電磁波無(wú)時(shí)不在身邊盤(pán)旋，只要電器是在使用的情況下，都有電磁場(chǎng)和電磁輻射，那么
山東會(huì )議室音響設備有輻射嗎?怎么預防呢?小編收集和整理了相關(guān)資料以供參考。
There are all kinds of electromagnetic waves hovering around us all the time. As long as the electrical appliances are used, there are electromagnetic fields and electromagnetic radiation. Is there any radiation from the audio equipment in Shandong conference room? How to prevent it? Xiao Bian collected and sorted out relevant materials for reference.
可以明確地說(shuō)，大部分會(huì )議室音響是不具備無(wú)線(xiàn)電磁波輻射的。音響的本質(zhì)是一個(gè)低頻功率放大器，放大的高信號頻率一般也就是20KHz，其輸出電壓也不會(huì )超過(guò)幾十伏，這種頻率距離產(chǎn)生電磁波輻射的頻率要差一個(gè)數量級了(1/10都不到)。
It can be clearly said that most conference room acoustics do not have radio electromagnetic wave radiation. The essence of sound is a low-frequency power amplifier. The amplified high signal frequency is generally 20KHz, and its output voltage will not exceed dozens of volts. This frequency is an order of magnitude different from the frequency of electromagnetic wave radiation (less than 1/10).
正因為由于音響工作頻率低，低頻電磁波也只能靠導線(xiàn)傳播。即使導線(xiàn)在傳播交流電的過(guò)程中泄露電磁信號，其產(chǎn)生輻射的能量遠小于微波爐、電磁爐、電視、吸塵器、電吹風(fēng)、手機等這些常見(jiàn)的電氣、電子產(chǎn)品。
Because of the low working frequency of audio, low-frequency electromagnetic waves can only be transmitted by wires. Even if the wire leaks electromagnetic signals in the process of transmitting alternating current, the radiation energy generated by it is far less than that of microwave ovens, electromagnetic ovens, televisions, vacuum cleaners, hair dryers, mobile phones and other common electrical and electronic products.
個(gè)別音響使用開(kāi)關(guān)電源，如果開(kāi)關(guān)電源做的不好會(huì )產(chǎn)生高頻電磁輻射，還有D類(lèi)功率放大器由于是數字信號的處理，其處理頻率要遠高于20KHz，可能產(chǎn)生一些電磁輻射，但這些功放市面上不多，且內部一般都有濾波裝置去除這種高次諧波。
Some audio systems use switching power supply. If the switching power supply is not well done, high frequency electromagnetic radiation will be generated. As Class D power amplifiers process digital signals, their processing frequency is much higher than 20KHz, which may generate some electromagnetic radiation. However, these power amplifiers are few in the market, and generally have filtering devices inside to remove such high-order harmonics.
經(jīng)過(guò)收集得到會(huì )議音箱是整個(gè)音響系統的終端，其作用是把音頻電能轉換成相應的聲能，并把它輻射到空間去。
The conference speaker is the terminal of the entire audio system, which is used to convert audio power into corresponding sound energy and radiate it into space.
它是音響系統其重要的組成部分，因為它擔負著(zhù)把電信號轉變成聲信號供人的耳朵直接聆聽(tīng)這么一個(gè)關(guān)鍵任務(wù)，它要直接與人的聽(tīng)覺(jué)打交道，而人的聽(tīng)覺(jué)是十分靈敏的，并且對復雜聲音的音色具有很強的辨別能力。
It is an important part of the sound system, because it undertakes the key task of transforming electrical signals into sound signals for human ears to listen directly. It has to deal directly with human hearing, which is very sensitive and has a strong ability to distinguish the timbre of complex sounds.
對音箱來(lái)說(shuō)更多磁場(chǎng)集中在低頻(50Hz)所以需要參考綠色數字，5uT/0.05kHz=100，如果測試數值超過(guò)100說(shuō)明對人體健康風(fēng)險較大。此外電源在經(jīng)過(guò)開(kāi)關(guān)管后頻率由50Hz變?yōu)?00KHz，所以需要參考紫色部分的數值，0.92uT/0.2MHz=4.6，如果測試數值超過(guò)4.6說(shuō)明對人體健康風(fēng)險較大。
For the speaker, more magnetic fields are concentrated at low frequency (50Hz), so it is necessary to refer to the green figure, 5uT/0.05kHz=100. If the test value exceeds 100, it indicates that the human health risk is high. In addition, the frequency of the power supply changes from 50Hz to 200KHz after passing through the switch tube, so it is necessary to refer to the value of the purple part, 0.92uT/0.2MHz=4.6. If the test value exceeds 4.6, it indicates that the risk to human health is high.
小編建議會(huì )議音箱雖小，輻射可不小，使用時(shí)好能離人體半米以上，以保護聽(tīng)力和身體健康。另外，音箱的低音效果越好，輻射污染就越強，在購買(mǎi)時(shí)需要慎重考慮。特別是孕婦、老人、小孩盡量減少使用音箱的次數，以免給自身造成傷害。更多相關(guān)事項就來(lái)我們網(wǎng)站
http://www.djfrj.net.cn咨詢(xún)了解吧。
The small editor suggested that although the conference speaker is small, its radiation may not be small, and it can be used more than half a meter away from the human body to protect hearing and health. In addition, the better the bass effect of the speaker, the stronger the radiation pollution, so you need to consider carefully when buying. In particular, pregnant women, the elderly and children should try to reduce the number of times they use speakers to avoid causing harm to themselves. Come to our website for more information http://www.djfrj.net.cn Ask and understand.
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