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Acoustic Measurements with a Quadcopter: Embedded System Implementations for Recording Audio from Above

机译:四轴飞行器的声学测量:用于从上方录制音频的嵌入式系统实现

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摘要

At present, making audio recording requires an investment of time and energy. Microphones must be setup, connected to amplifiers and filters, and then passed into a computer’s sound card. If the micro-phone is not positioned properly, someone must manually move the microphone stand and re-test the audio. If multiple measurements are needed from around a room, a significant portion of time will be spent just moving the microphone and cables. An automated method of moving the microphone around the room is often desired and this thesis lays out the option of using a quadcopter to facilitate this work.Explored here are two different embedded systems that are capable of making measurements from a hovering quadcopter. The first is a rapidly developed design using an Apple iPod Touch. While the recording quality and the ease-of-use of the iPod are very high, the system does not offer any low-level OS control, resulting in unpredictable delays when synchronizing to the loudspeaker setup. However, this system does allow for making significant measurements of quadcopter noise and stabil-ity, which prove valuable for future designs. The second design seeks to improve upon the synchroni-zation issue. Built using two Atmel SAM4L Xplained Pro development boards, the system achieves a sample accurate synchronization between the quadcopter and loudspeaker systems.The final conclusions combine the results from both systems. Recommendations for future iterations of the SAM4L design are discussed. Suggestions for the SAM4L design include improving audio re-cording quality, reducing the amount of noise the quadcopter generates, and multiple methods for can-celling noise that is recorded by the microphone.
机译:目前,进行录音需要花费时间和精力。必须先设置麦克风,将其连接到放大器和滤波器,然后将其传递到计算机的声卡中。如果麦克风放置不正确,则必须有人手动移动麦克风支架并重新测试音频。如果需要在一个房间周围进行多次测量,则仅在移动麦克风和电缆时将花费大量时间。通常需要一种在房间内移动麦克风的自动化方法,因此本文提出了使用四轴飞行器来简化这项工作的选择。这里探讨了两个不同的嵌入式系统,它们能够通过四轴飞行器进行测量。首先是使用Apple iPod Touch的快速开发的设计。尽管iPod的录制质量和易用性很高,但该系统不提供任何底层操作系统控制,因此在与扬声器设置同步时会导致无法预料的延迟。但是,该系统的确可以对四轴飞行器的噪声和稳定性进行大量测量,这对于将来的设计非常有价值。第二种设计旨在改进同步问题。该系统使用两个Atmel SAM4L Xplained Pro开发板构建,在四轴飞行器和扬声器系统之间实现了示例准确的同步。最终结论结合了这两个系统的结果。讨论了SAM4L设计未来迭代的建议。对SAM4L设计的建议包括提高音频记录质量,减少四轴飞行器产生的噪声量以及多种消除麦克风记录的噪声的方法。

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    Klapel Jonathan;

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  • 年度 2014
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  • 正文语种 eng
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