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# System prepended metadata

title: Lab meeting

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# Lab meeting

20240201

1. 18 台錄音機 (9 WTs from 3 WFs)，自六月初至九月初，約 92 天之錄音
1. 每 15 分鐘錄 1 分鐘，日落前 30 分鐘至日出後 30分鐘
1. 共切成 939,384 個 5 秒長之檔案 (每台錄音機平均約 52,188 個檔案)
1. 以聲音參數 (frequency range, pulse duration, inter-pulse interval, minimum # of pulses) 過濾掉不含 bat echolocation call 的檔案。初步得到 113,766 個可能含 bat echolocation call 的檔案，佔全部檔案的 **12.1%**。
2. Top 錄到的 call 平均僅佔 **3.6%** (約 1,879 檔案/台，或 20 檔案/台/夜)，Ground 佔 **20.6%** (約 10,751 檔案/台，或 117 檔案/台/夜)。
3. 如果每架錄音機每月取三夜分析，約有 (20+117) x 9(WT) x 3(day) x 3(month) = **11,097 個檔案**。



![image](https://hackmd.io/_uploads/B1ZE_qdqa.png)




 
  
   
    
    





20231109


達德環教中心
![480838438397149523.jpg](https://hackmd.io/_uploads/Bk_YR1976.jpg)

![480838433549058276.jpg](https://hackmd.io/_uploads/ByktC1qXa.jpg)


![image.png](https://hackmd.io/_uploads/H1PRblc7a.png)

![image.png](https://hackmd.io/_uploads/rk5uWxcQp.png)

![image.png](https://hackmd.io/_uploads/S1So-x57a.png)


![image.png](https://hackmd.io/_uploads/S1Aezgcma.png)










20230615

  
  
香山 #6
![](https://hackmd.io/_uploads/r1lgxe_Dn.jpg)
  
彰工#23  
![](https://hackmd.io/_uploads/r1uc2JuD2.jpg)
  
台中港#9
![](https://hackmd.io/_uploads/HyMp3y_wn.jpg)
 
  
  
  
  
目前資料格式
![](https://hackmd.io/_uploads/rkJ5Fy_vh.png)
  

Figure 2 . Comparisons of bat fatalities per turbine per year among 15 selected wind farms and phases.
![](https://hackmd.io/_uploads/r11zEJOP2.png)
   
     
previous
![](https://hackmd.io/_uploads/rk8V4kOvh.png)


Figure 3.  Comparisons of bat fatalities per year among species, months, and phases. All = all bat fatalities combined, Piab = Pipistrellus abramus, Eppa = Eptesicus pachyomus horikawai, Nypl = Nyctalus plancyi.
![](https://hackmd.io/_uploads/B179VJ_wh.png)
 
previous
![](https://hackmd.io/_uploads/Bk1oEyOD3.png)


Figure S1  . Comparisons of bat fatalities per year at the 192 wind turbines with searched area > 5% of 15 wind farms.
![](https://hackmd.io/_uploads/ByjnEkOvn.png)
 
previous
![](https://hackmd.io/_uploads/HJRa4J_D2.png)














20230525 update
* 由於桃園全部合併為一處估算，故刪去正確率較低之南桃園錄音樣點 (TY_G26、TY_G35)，留北區樣點 (TY_1，大園#1) 進行後續估算。
* 分割前，八錄音樣點之全部檔案數為 91,645 個，南桃園為 10,437 個 (各月份分別為 790, 1858, 2154, 2046, 1981, 1608 個)
分割後，八錄音樣點之全部檔案數為 225,318 個，扣除南桃園後為 196,766 個。













20230518 Lab meeting


1. 8 個錄音樣點
1. 每月每樣點選一晚 (以搜尋前一夜為主，若無則往前推)
1. Recordings were split into 5-sec file 
1. 225,318 recordings in total (53,748 classified as calls, 171,570 as noise)
1. 檢視各夜判別的正確率。由 call 與 noise 中各取前 100 個檔案進行人工確認，並計算正確率。
1. 整體平均 call => 74.7% (range: 0-100%), noise => 99.1% (range: 90-100%)

Fig. 1. The efficacy of the kaleidoscope filter
![](https://hackmd.io/_uploads/rkA2hxQH3.png)







利用上述正確率估算每夜實際蝙蝠活動量

Fig. 2. The corelation between number of raw and estimated bat calls/night
![](https://hackmd.io/_uploads/SJuBplXr2.png)







蝙蝠活動量與當次調查估算之死亡數呈顯著正相關
Fig. 3. Bat activity vs. fatality at 8 wind farms (phase 2)
![](https://hackmd.io/_uploads/SkEu3lmS2.png)

