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    當前位置:噪聲的產生原因

    噪聲的產生原因 The cause of noise 1、電磁輻射干擾噪聲 1. Interfering noise from electromagnetic radiation 環境的雜散電磁波輻射干擾,如手機,對講機等通訊設備的高頻電磁波輻射干擾、周圍環境的電梯、空調、汽車點火、電焊等電脈沖輻射、演播廳燈光控制采用可控硅整流控制設備所產生的輻射,都會通過音頻傳輸線直接混入傳輸信號中形成噪聲、或穿過屏蔽不良的機器設備的外殼干擾機內電路產生干擾噪聲。實踐表明,在一些特殊的場合,如大量使用可控硅調光設備的演播廳等,如果沒有采取可靠的屏蔽和接地措施,噪聲將會很嚴重。 Stray electromagnetic radiation interference environment, such as mobile phone, high frequency electromagnetic wave communication equipment such as walkie talkie radiation interference, elevator, air conditioning, the environment of a vehicle ignition and welding electric pulse radiation, studio lighting control adopts the silicon controlled rectifier radiation produced equipment, will be directly incorporated into the circuit noise, or interference machine through good shielding equipment produced in the form of a transmitted signal interference noise through the audio transmission line. Practice shows that in some special occasions, such as a large number of studios such as SCR dimming equipment, if there is no reliable shielding and earthing measures, the noise will be very serious. 2、電源干擾噪聲 2, power interference noise 音響設備的外部干擾,除電磁車輻射方式外,電源部分引入干擾噪聲將是另一個產生噪聲的主要原因拱形骨架模具 保定代理記賬 保定道閘 防撞護欄模具 風電基礎模具 保定空壓機 北京真空泵城市電網由于各種照明設備、動力設備、控制設備共同接入,形成了一個十分嚴重的干擾源。如接在同一電網中的燈光調控設備、空調、馬達等等設備會在電源線路上產生尖峰脈沖、浪涌電流,不同頻率的紋波電壓,通過電源線路竄入音響設備的供電電源,總會有一部分干擾噪聲無法通過音響設備的電源電路有效的濾除,將必然會在設備內部形成噪聲。尤其是同一電網中的電磁兼容性不達要求的大功率設備,是干擾音響設備的主要原因。 The external interference of the sound equipment, except the electromagnetic vehicle radiation mode, the source part of the interference noise will be another main cause of noise. Due to the joint access of various lighting equipment, power equipment and control equipment, the urban power grid has formed a very serious interference source. As in the same power lighting control equipment, air conditioning, motor and equipment will produce peak pulse and surge current in the power line, the ripple voltage of different frequencies, the power supply Cuanru audio equipment power supply line, there is always a part of the noise filter unable through the power supply circuit of sound equipment effectively. Will the formation of noise inside the equipment. Especially, the large power equipment which is not required by the electromagnetic compatibility in the same power grid is the main reason for disturbing the sound equipment

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