Audio Technica ATND1061LK Manual
Beamforming array microphone
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- User manual (115 pages) ,
- User manual (98 pages) ,
- Operation manual (17 pages)
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Summary of Contents for Audio Technica ATND1061LK
- Page 1 ATND1061LK ATND1061DAN Beamforming Array Microphone Voice Lift Function Ver.1.0...
- Page 2 What is “voice lift”? Introduction Voice lift is a general term for solutions that enable people in the same room to hear voices uniformly and clearly, and is necessary for enabling natural conversations among multiple people. Although the ATND1061 is designed to be used for web conferencing, it has also been increasingly used in hybrid conferencing, which has become more commonplace in recent years with meetings split between in-person and remote attendees..
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Page 3: Room Conditions
Room conditions Using the voice lift function enables hybrid conferences to be held even in large rooms that require the use of multiple microphones. It is said that in a typical meeting, it becomes difficult to hear natural voices from a distance of 7 m (23’) away from the talker, which is why the voice lift solution was designed to be effective in large rooms of more than 10 m (33’) on a side. - Page 4 Calculating PAG/NAG Calculating PAG/NAG is helpful for voice lifting without causing system feedback. NAG (Needed Acoustic Gain): Gain required by the system PAG (Potential Acoustic Gain): Gain that can be increased without causing feedback Obtaining PAG and NAG PAG = 20*log((D0*D1)/(D2*Ds))-10*log(NOM)–FSM NAG = 20*log(D0/D3) FSM = Feedback Stability Margin NOM = Number of Open Microphones...
- Page 5 Example of application in an actual room If calculated using the numerical example as a reference, PAG − NAG = −2.6 dB. Because the voice lift function of the ATND1061 provides a margin of approximately 5 dB, this results in the calculation “−2.6 dB + 5 dB = 2.4 dB”, which satisfies “PAG −...
- Page 6 When the talker(s) and speaker are near each other In the example above, if the talker seated in the middle is also expected to speak, not only does D0 become smaller, but the microphone will also be directed toward the speaker, resulting in a reduced margin and increased risk of feedback. This situation would then require the following measures to be taken (specific measures will differ depending on the actual environment).
- Page 7 Unique technology for suppressing feedback A new 7th beam is used internally for voice lifting. Unlike normal sound pickup beams, this beam is different in that it moves within the entire sound pickup range (excluding Exclusion Zones, i.e., Coverage Zones and Priority Zones). Once focused on a talker, it stays there for 70 ms before moving on to the next talker.
- Page 8 Using the voice lift function and AEC (Acoustic Echo Cancellation) in combination When delivering audio remotely, such as via online lectures or online meetings held in a large room, the voice lift and AEC must be used in combination. Although AEC is a processing technique that prevents microphones from picking up amplified far-end audio, which would otherwise return to the far end, when used in conjunction with the voice lift, it causes further mixing with local sounds.