{"product_id":"sonifex-rb-aec-acoustic-echo-canceller","title":"Sonifex RB-AEC | Acoustic Echo Canceller","description":"\u003cp\u003eThe RB-AEC 1U rack-mount is an acoustic echo canceller primarily designed for the benefit of studio personnel for television and radio. When a studio presenter’s microphone signal is played out through a monitor speaker in the control room, it can be picked up by the control room microphone(s) and returned to the presenter’s earpiece as an undesirable echo. In circumstances where green screen video processing is taking place, the delay can be greater than 200ms. Additionally, the dimensions, occupancy and distance between mouth and microphone can further influence the echo. The RB-AEC is used to remove the entire control room monitor speaker output from the presenter’s feed by adapting to the environment in which the control room microphones are placed. Although acoustic echo cancellation is more commonly implemented in telephony systems, the Sonifex RB-AEC is designed to produce broadcast quality cancellation. Much like during a conference call configuration between two rooms, each room has a microphone and speaker to conduct a conversation. When an occupant of one room speaks, it takes a certain length of time before it is received in the second room. Without a suitable solution this ‘delayed’ signal can then be captured by the microphone in the second room and returned back to the first room as an echo. In the particular example of TV production, as well as the processing\/transmission delay, sound reflections from the control room monitor speaker into the control room microphone(s) cause the studio earpiece to suffer further delay. The sound reflections in the control room vary with the contents of the room including any personnel present. Also, different frequencies produce varying reflections across various types of surfaces and magnitudes within the room. For a 15m distance between speaker and microphone the delay is as much as 40ms.The DSP solution offered by the RB-AEC can dynamically compensate for varying configurations. The post-processed transmission output program from the studio (A) is sent to the RB-AEC as an analogue or digital audio signal (the stereo input is auto-sensing) which acts as a mix-minus to the input signal (B) from the Control Room. The RB-AEC removes the unwanted acoustic echoes so that the audio sent to the presenter’s earpiece (C) is free of echoes and reflection artefacts. Applications\u003c\/p\u003e\u003ch3\u003eProduct Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAdaptive echo cancellation for studio acoustic delay \/ echo.\u003c\/li\u003e\n\u003cli\u003eBuilt-in web server interface.\u003c\/li\u003e\n\u003cli\u003eAutomatic operation once configured.\u003c\/li\u003e\n\u003cli\u003eA \u0026amp; B Auto-selecting mono analogue \/ stereo AES\/EBU digital audio XLR inputs.\u003c\/li\u003e\n\u003cli\u003eBalanced analogue and AES\/EBU outputs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cp\u003eIn a TV production environment where presenters are fed a signal which has some form of acoustic delay or echo. Any situation where adaptive echo cancellation is required.\u003c\/p\u003e\u003ch3\u003eProduct Category\u003c\/h3\u003e\u003cp\u003eEcho Cancellation\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ch4\u003eAudio Specification\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudio Input (Program):\u003c\/strong\u003e 1 x mono analogue or AES\/ EBU digital on XLR 3-pin female (autoselecting)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudio Input (From Control Room):\u003c\/strong\u003e 1 x mono analogue or AES\/EBU digital on XLR 3-pin female (autoselecting)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Level (0dB Input Gain):\u003c\/strong\u003e +18dBu (analogue)\/0dBFS (digital)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCMRR:\u003c\/strong\u003e \u0026gt;60dB typical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e 20kΩ (analogue) 110Ω (digital with termination switchable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAES\/EBU Input:\u003c\/strong\u003e 32kHz to 192kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Gain:\u003c\/strong\u003e 0, +6, +12 or +18dB digital gain (switchable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudio Outputs (Analogue):\u003c\/strong\u003e 2 x mono analogue on XLR 3-pin male\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudio Outputs (AES\/EBU):\u003c\/strong\u003e 1 x stereo digital AES\/EBU on XLR 3-pin male\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Output Level:\u003c\/strong\u003e +18dBu (analogue)\/0dBFS (digital)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e \u0026lt;50Ω (analogue)\/110Ω (digital)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAES\/EBU Output Sample Rates:\u003c\/strong\u003e Selectable 32kHz - 192kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDistortion:\u003c\/strong\u003e \u0026lt;0.02% (1kHz, +8dBu output)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise:\u003c\/strong\u003e -84dB RMS, unity gain ref +8dBu output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz-12kHz +0\/-0.5dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRejection Ratio (Input to Output):\u003c\/strong\u003e Typically 20dB on complex waveforms, reference peak level of 0dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote I\/O Port:\u003c\/strong\u003e 9 way D-Type socket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEthernet Port:\u003c\/strong\u003e 1 x RJ45 with status LEDs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMains Input:\u003c\/strong\u003e Filtered IEC, continuously rated 85 264VAC @ 47-63Hz, 10W max\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Rating:\u003c\/strong\u003e Anti-surge fuse 1A 20 x 5mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eControls\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e 1 x Ethernet port and 1 x rear panel 4-way dipswitch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset:\u003c\/strong\u003e 1 x front panel recessed button\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eEquipment Type\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eRB-AEC:\u003c\/strong\u003e Acoustic echo canceller\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003ePhysical Specification\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (Raw):\u003c\/strong\u003e 48cm (W) x 10.8cm (D) x 4.2cm (H)(1U)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (Raw):\u003c\/strong\u003e 19” (W) x 4.3” (D) x 1.7” (H) (1U)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (Boxed):\u003c\/strong\u003e 58.5cm (W) x 22.5cm (D) x 7cm (H)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (Boxed):\u003c\/strong\u003e 23” (W) x 8.9” (D) x 2.8” (H)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Nett: 1.5kg Gross: 2.0kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Nett: 3.3lbs Gross: 4.4lbs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSupport and Downloads\u003c\/h3\u003e\u003ch4\u003eHandbooks \u0026amp; Guides\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/ad56550c.delivery.rocketcdn.me\/wp-content\/uploads\/products\/RB-AEC\/redbox-01_hb.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eRB-AEC Handbook\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eBrochures\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/brochures-guides\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eClick to visit the brochures page.\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eDeclarations\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/support\/ce-ukca-declarations\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eClick to visit the declarations page.\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eFirmware\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/ad56550c.delivery.rocketcdn.me\/wp-content\/uploads\/products\/RB-AEC\/RB-AEC1-V1_02_000_167.zip\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eRB-AEC Version 1.02.000.167 Date 09\/11\/2018\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/ad56550c.delivery.rocketcdn.me\/wp-content\/uploads\/products\/RB-AEC\/SCi_setup.zip\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSCi 2 Software Control Interface (install as an administrator) Version 2.0.12 Date 8\/12\/2015\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eRelated Products\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/product\/rb-rk3\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eRB-RK3 Rear Panel Mounting\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eOfficial Links\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/product\/rb-aec\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOfficial Product Page\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e","brand":"Sonifex","offers":[{"title":"Default Title","offer_id":53670172426581,"sku":"RB-AEC","price":1248.64,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/6993\/3141\/files\/Sonifex_Sonifex_RB_AEC_Acoustic_Echo_Canceller_01.jpg?v=1780661324","url":"https:\/\/tvpro.lt\/products\/sonifex-rb-aec-acoustic-echo-canceller","provider":"tvpro.lt – Broadcast \u0026 Pro Video Equipment Online Store","version":"1.0","type":"link"}