High microphone signal-to-noise ratio enhances acoustic sampling of wildlife.
High microphone signal-to-noise ratio enhances acoustic sampling of wildlife.
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DOI：
10.7717/peerj.9955
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发表时间：
2020
期刊：
影响因子：
2.7
通讯作者：
Prawiradilaga DM
中科院分区：
文献类型：
--
作者：
Darras KFA;Deppe F;Fabian Y;Kartono AP;Angulo A;Kolbrek B;Mulyani YA;Prawiradilaga DM
自动声音记录器是生态学中流行的采样工具。然而，到目前为止，麦克风本身很少受到关注，并且很少提到决定录音音质的规格。在这里，我们证明了麦克风的信噪比采样发声动物的重要性。我们在现场测试了12种不同的麦克风型号，并测量了它们的信噪比和检测范围。我们还测量了他们记录的鸟类和蝙蝠的发声活动，鸟类物种丰富度，蝙蝠呼叫类型丰富度，以及自动检测鸟类和蝙蝠呼叫的性能。我们测试了这些措施中的每一个与统计模型中的信噪比的关系。麦克风信噪比对声音检测空间区域有积极影响，从最低信噪比麦克风到最高信噪比麦克风，可听声音的空间区域增加了1.7倍，超声波的空间区域增加了10倍。因此，采样的发声活动增加了1.6倍的鸟类和9.7蝙蝠。相应地，鸟类和蝙蝠的物种库不能被较低信噪比的麦克风完全检测到。鸟类和蝙蝠的叫声的自动检测的性能，测量其精度和召回，麦克风的信噪比显着增加。麦克风信噪比是声音记录系统的一个重要特性，对鸟类和蝙蝠的声学采样性能有积极影响。应该通过选择适当的麦克风来最大化它，并独立量化，特别是在超声范围内。
Automated sound recorders are a popular sampling tool in ecology. However, the microphones themselves received little attention so far, and specifications that determine the recordings’ sound quality are seldom mentioned. Here, we demonstrate the importance of microphone signal-to-noise ratio for sampling sonant animals. We tested 12 different microphone models in the field and measured their signal-to-noise ratios and detection ranges. We also measured the vocalisation activity of birds and bats that they recorded, the bird species richness, the bat call types richness, as well as the performance of automated detection of bird and bat calls. We tested the relationship of each one of these measures with signal-to-noise ratio in statistical models. Microphone signal-to-noise ratio positively affects the sound detection space areas, which increased by a factor of 1.7 for audible sound, and 10 for ultrasound, from the lowest to the highest signal-to-noise ratio microphone. Consequently, the sampled vocalisation activity increased by a factor of 1.6 for birds, and 9.7 for bats. Correspondingly, the species pool of birds and bats could not be completely detected by the microphones with lower signal-to-noise ratio. The performance of automated detection of bird and bat calls, as measured by its precision and recall, increased significantly with microphone signal-to-noise ratio. Microphone signal-to-noise ratio is a crucial characteristic of a sound recording system, positively affecting the acoustic sampling performance of birds and bats. It should be maximised by choosing appropriate microphones, and be quantified independently, especially in the ultrasound range.
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影响因子：
0.9
作者：
Rempel, Robert S.;Francis, Charles M.;Campbell, Margaret
通讯作者：
Campbell, Margaret
影响因子：
2.4
作者：
Chen, Zhixin;Maher, Robert C.
通讯作者：
Maher, Robert C.
DOI：
10.1080/09524622.2015.1133320
发表时间：
2016-05-03
影响因子：
1.8
作者：
Katz, Jonathan;Hafner, Sasha D.;Donovan, Therese
通讯作者：
Donovan, Therese
影响因子：
6.6
作者：
Adams, Amanda M.;Jantzen, Meredith K.;Fenton, Melville Brockett
通讯作者：
Fenton, Melville Brockett
影响因子：
2.8
作者：
Matsuoka, Steven M.;Bayne, Erin M.;Song, Samantha J.
通讯作者：
Song, Samantha J.