林子翔
    • Create new note
    • Create a note from template
      • Sharing URL Link copied
      • /edit
      • View mode
        • Edit mode
        • View mode
        • Book mode
        • Slide mode
        Edit mode View mode Book mode Slide mode
      • Customize slides
      • Note Permission
      • Read
        • Only me
        • Signed-in users
        • Everyone
        Only me Signed-in users Everyone
      • Write
        • Only me
        • Signed-in users
        • Everyone
        Only me Signed-in users Everyone
      • Engagement control Commenting, Suggest edit, Emoji Reply
    • Invite by email
      Invitee

      This note has no invitees

    • Publish Note

      Share your work with the world Congratulations! 🎉 Your note is out in the world Publish Note

      Your note will be visible on your profile and discoverable by anyone.
      Your note is now live.
      This note is visible on your profile and discoverable online.
      Everyone on the web can find and read all notes of this public team.
      See published notes
      Unpublish note
      Please check the box to agree to the Community Guidelines.
      View profile
    • Commenting
      Permission
      Disabled Forbidden Owners Signed-in users Everyone
    • Enable
    • Permission
      • Forbidden
      • Owners
      • Signed-in users
      • Everyone
    • Suggest edit
      Permission
      Disabled Forbidden Owners Signed-in users Everyone
    • Enable
    • Permission
      • Forbidden
      • Owners
      • Signed-in users
    • Emoji Reply
    • Enable
    • Versions and GitHub Sync
    • Note settings
    • Note Insights New
    • Engagement control
    • Make a copy
    • Transfer ownership
    • Delete this note
    • Save as template
    • Insert from template
    • Import from
      • Dropbox
      • Google Drive
      • Gist
      • Clipboard
    • Export to
      • Dropbox
      • Google Drive
      • Gist
    • Download
      • Markdown
      • HTML
      • Raw HTML
Menu Note settings Note Insights Versions and GitHub Sync Sharing URL Create Help
Create Create new note Create a note from template
Menu
Options
Engagement control Make a copy Transfer ownership Delete this note
Import from
Dropbox Google Drive Gist Clipboard
Export to
Dropbox Google Drive Gist
Download
Markdown HTML Raw HTML
Back
Sharing URL Link copied
/edit
View mode
  • Edit mode
  • View mode
  • Book mode
  • Slide mode
Edit mode View mode Book mode Slide mode
Customize slides
Note Permission
Read
Only me
  • Only me
  • Signed-in users
  • Everyone
Only me Signed-in users Everyone
Write
Only me
  • Only me
  • Signed-in users
  • Everyone
Only me Signed-in users Everyone
Engagement control Commenting, Suggest edit, Emoji Reply
  • Invite by email
    Invitee

    This note has no invitees

  • Publish Note

    Share your work with the world Congratulations! 🎉 Your note is out in the world Publish Note

    Your note will be visible on your profile and discoverable by anyone.
    Your note is now live.
    This note is visible on your profile and discoverable online.
    Everyone on the web can find and read all notes of this public team.
    See published notes
    Unpublish note
    Please check the box to agree to the Community Guidelines.
    View profile
    Engagement control
    Commenting
    Permission
    Disabled Forbidden Owners Signed-in users Everyone
    Enable
    Permission
    • Forbidden
    • Owners
    • Signed-in users
    • Everyone
    Suggest edit
    Permission
    Disabled Forbidden Owners Signed-in users Everyone
    Enable
    Permission
    • Forbidden
    • Owners
    • Signed-in users
    Emoji Reply
    Enable
    Import from Dropbox Google Drive Gist Clipboard
       Owned this note    Owned this note      
    Published Linked with GitHub
    • Any changes
      Be notified of any changes
    • Mention me
      Be notified of mention me
    • Unsubscribe
    # NTFI研究筆記 * key points * let them know that Ao is important * let them thoroughly understand AO as they may not be familiar with this topic * eff. digit * 到時候檔案會很大 * 實驗基本部分:儀器、地點、實驗時間、一堆照片 ==GPS 25.1445299, 121.8050581== * PSD發現的特殊時段(我們從PSD找到的異常) * 日落日出的兩根黃色(溫度跟光度跟潮汐) * 日夜大規模的比較(各頻率、各能量) * 18:00~19:30 anomaly(鰕虎、雀鯛跟低頻槍蝦的互動):2.7kHz低、300Hz高(播放槍蝦snapping Shrimp跟鰕虎goby 的聲音),以及其他在八點左右之後的相似patterns * 04:00(船嚇跑了槍蝦和魚,播船的聲音) * 船的活動18:51 00:18、潛水客或其他原因(小尺度,播潛水客的聲音) ==簡報'https://hackmd.io/@hchs-earthscience/r15Ish8n5'== # **NEW!!!!!!!**[ppt編輯連結](https://1drv.ms/p/s!AiPxlN1a7YpOhnXyUPmEvwkE9mB0) ### 濾波計畫 1. 全天剪頻率-> 0~1200Hz 2. 取21:30 無人聲純自然聲音做背景降噪音->失敗 3. 取18:54 ->失敗 4. 取21:30做魚跟背景聲音移除->半成功 5. 取人聲音做聲音移除? ## P50圖發現的奇特現象 ![](https://i.imgur.com/FT0e8tU.png) ![](https://i.imgur.com/ybuHaJI.png) ### anomalies in time #### valleys 1. 1839.42(lum<21.6)~1909, 2.2~3.8kHz, low amplitude median 55dB (超明顯) ==A:有種槍蝦是peak ~3kHz, ~20dB,在這段時間內此中槍蝦活動力高,製造較多分貝較低的聲音,占比高導致中位數降低== ~~==A:槍蝦在吃東西,所以沒有空繼續捕捉==~~ ![](https://i.imgur.com/eXgpU9d.png) ![](https://i.imgur.com/6WGuMzr.png) valley~ 2500Hz ![](https://i.imgur.com/IKd6yeq.png) ![](https://i.imgur.com/mmBlDiE.png) ![](https://i.imgur.com/zFjJg2y.png) 3. 1954~2015 & 2024~2033 & 2052 & 2106 & 2115 & 2127~2233 all frequency (boats) 1957 1:20秒 蝦虎 ~170Hz 2kHz的中位數有明顯的下降。 ![](https://i.imgur.com/r6OcS19.png) 5. 0015~0324 all fre (slight) (boats???) ==0018.40~0019.20 boat confirmed== ![](https://i.imgur.com/2D4QNw7.png) ![](https://i.imgur.com/QGv2XIp.png) 0340-0343 船(明顯低頻分貝增加,已確定不是魚的聲音) ![](https://i.imgur.com/USDURSb.png) 6. 0357 all fre 黃轉藍 (超明顯) ==A:被船嚇跑、被干擾== 7. 0815 all fre (超明顯)頻譜圖呈現40kHz脈衝訊號 8. 0812~0815 船 ![](https://i.imgur.com/bZFVUYr.png) 8. 0848 船和潛水客(潛水客呼氣頻率約為10次一分鐘) ![](https://i.imgur.com/MawtByd.png) 8. 0945 >31kHz ##### peaks 1. 1840~1912 >11kHz(超明顯) 2. 18:51 <300Hz 雀鯛 想法:蝦虎魚和槍蝦是共生關係,當時低頻聲音變大聲,可能是因為雀鯛活動力上升(繁殖季求偶),而蝦虎魚和雀鯛是競爭關係,因此產生警戒,故活動力下降,同時槍蝦的活動力也下降。 4. 1840~1938 4.6~7.3kHz +>10kHz (超明顯) ==日落:== 4. 0340-0343 船(後端有一個從低頻到高頻的馬達聲(可能可以推論出船的行進方向)) 5. 6. 0359.00~0400.40 (rescue?)boat <1kHz非常明顯 ![](https://i.imgur.com/yTDi6XS.png) ![](https://i.imgur.com/x0Wkhh0.png) ![](https://i.imgur.com/B6SjHR1.png) 4. 0400~0439 all fre 藍轉黃 ==慢慢恢復== 5. 0439~0521 2.7~7.3 kHz +>10kHz (超明顯) ==慢慢恢復+日出== ### anomalies in frequency 1. <300Hz 兩種魚 3. 500~1000Hz 一種魚 4. 1~3.5kHz 摳摳槍蝦 偶發事件 5. 2.7~7.3 kHz、10.7~20k Hz all time 6. 已確定和蟹守螺無關 7. ## Q&A * Q2. 為何聲音在海水中不易被吸收? * Q3. the meaning of sampling frequency? * Q4. ## 相關係數分析 1.dB和光度 2.dB和潮位 3.dB對溫度 ## References 潮汐與槍蝦 Inyong Jeong and Dong-Guk Paeng(2022)。Circadian and Tidal Changes in Snapping Shrimp (Alpheus brevicristatus) Sound Observed by a Moored Hydrophone in the Coastal Sea of Western Jeju。Applied Sciences,6493,6。![](https://i.imgur.com/5AzZ5um.png) ==海洋生物時頻譜 https://ejournal.stpi.narl.org.tw/sd/download?source=10712-09.pdf&vlId=1714245f06b444338ef516f2b64eccd6&nd=1&ds== 雀鯛求偶時會發出叫聲 H. Yan. (translated from Chinese)(2021)。The Senses of Fish. (translated from Chinese) The Omics in the Ocean(translated from Chinese), 109, 105~107. ==雀鯛active time (P18)、魚類發聲原理 https://www.discoverboating.com/resources/best-times-for-saltwater-freshwater-fishing== Yuqing, M., Yanan, L., & Shuyong, Z. (2016). Analysis of the physical chemistry principles of the strike process of snapping shrimp. Chemistry, 7, 16. http://course.sdu.edu.cn/Download2/20210822222611424.pdf Lin, T., Chou, T., Huang, C. (translated from Chinese) (2021). Soundscapes Underwater at Chaojing Park, Keelung and Guangshing Sea Area, Taoyuan. (translated from Chinese) (Version 2021-11-24T07:28:08.760764) [Data set]. https://pid.depositar.io/ark:37281/k5g258093 https://data.depositar.io/dataset/cea0c/resource/b96c319f-999c-4861-bd8b-bfaf1732a463 Lillis, A., & Mooney, T. A. (2018). Snapping shrimp sound production patterns on Caribbean coral reefs: relationships with celestial cycles and environmental variables. Coral Reefs, 37(2), 597-607. https://www2.whoi.edu/site/amooney/wp-content/uploads/sites/31/2018/06/Lillis_Mooney_2018_CR.pdf ==鰕虎(或其他魚)發聲機制與特徵 (https://ejournal.stpi.narl.org.tw/sd/download?source=10805-04.pdf&vlId=744d20a3f16042e8abd0435006dac0cf&nd=1&ds=1)== ![](https://i.imgur.com/P5cHXTw.png) ![](https://i.imgur.com/DjrOSmp.png) ==https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4711987/ https://espace.curtin.edu.au/bitstream/handle/20.500.11937/47625/246321_246321.pdf?sequence=2 https://www.researchgate.net/publication/275583013_Nocturnal_diurnal_crepuscular_activity_assessments_of_Pisauridae_and_Lycosidae== Class A: A-槍蝦 B-槍蝦 C-槍蝦 D-槍蝦 雀鯛 Class B: 溫度 光度 潮位 人類潛水活動密度 人類船舶密度 共5*5=25種 ## 生物性問題 * 晨昏性生物的定義? * 日夜行性的定義(日-夜/日+夜)

    Import from clipboard

    Paste your markdown or webpage here...

    Advanced permission required

    Your current role can only read. Ask the system administrator to acquire write and comment permission.

    This team is disabled

    Sorry, this team is disabled. You can't edit this note.

    This note is locked

    Sorry, only owner can edit this note.

    Reach the limit

    Sorry, you've reached the max length this note can be.
    Please reduce the content or divide it to more notes, thank you!

    Import from Gist

    Import from Snippet

    or

    Export to Snippet

    Are you sure?

    Do you really want to delete this note?
    All users will lose their connection.

    Create a note from template

    Create a note from template

    Oops...
    This template has been removed or transferred.
    Upgrade
    All
    • All
    • Team
    No template.

    Create a template

    Upgrade

    Delete template

    Do you really want to delete this template?
    Turn this template into a regular note and keep its content, versions, and comments.

    This page need refresh

    You have an incompatible client version.
    Refresh to update.
    New version available!
    See releases notes here
    Refresh to enjoy new features.
    Your user state has changed.
    Refresh to load new user state.

    Sign in

    Forgot password

    or

    By clicking below, you agree to our terms of service.

    Sign in via Facebook Sign in via Twitter Sign in via GitHub Sign in via Dropbox Sign in with Wallet
    Wallet ( )
    Connect another wallet

    New to HackMD? Sign up

    Help

    • English
    • 中文
    • Français
    • Deutsch
    • 日本語
    • Español
    • Català
    • Ελληνικά
    • Português
    • italiano
    • Türkçe
    • Русский
    • Nederlands
    • hrvatski jezik
    • język polski
    • Українська
    • हिन्दी
    • svenska
    • Esperanto
    • dansk

    Documents

    Help & Tutorial

    How to use Book mode

    Slide Example

    API Docs

    Edit in VSCode

    Install browser extension

    Contacts

    Feedback

    Discord

    Send us email

    Resources

    Releases

    Pricing

    Blog

    Policy

    Terms

    Privacy

    Cheatsheet

    Syntax Example Reference
    # Header Header 基本排版
    - Unordered List
    • Unordered List
    1. Ordered List
    1. Ordered List
    - [ ] Todo List
    • Todo List
    > Blockquote
    Blockquote
    **Bold font** Bold font
    *Italics font* Italics font
    ~~Strikethrough~~ Strikethrough
    19^th^ 19th
    H~2~O H2O
    ++Inserted text++ Inserted text
    ==Marked text== Marked text
    [link text](https:// "title") Link
    ![image alt](https:// "title") Image
    `Code` Code 在筆記中貼入程式碼
    ```javascript
    var i = 0;
    ```
    var i = 0;
    :smile: :smile: Emoji list
    {%youtube youtube_id %} Externals
    $L^aT_eX$ LaTeX
    :::info
    This is a alert area.
    :::

    This is a alert area.

    Versions and GitHub Sync
    Get Full History Access

    • Edit version name
    • Delete

    revision author avatar     named on  

    More Less

    Note content is identical to the latest version.
    Compare
      Choose a version
      No search result
      Version not found
    Sign in to link this note to GitHub
    Learn more
    This note is not linked with GitHub
     

    Feedback

    Submission failed, please try again

    Thanks for your support.

    On a scale of 0-10, how likely is it that you would recommend HackMD to your friends, family or business associates?

    Please give us some advice and help us improve HackMD.

     

    Thanks for your feedback

    Remove version name

    Do you want to remove this version name and description?

    Transfer ownership

    Transfer to
      Warning: is a public team. If you transfer note to this team, everyone on the web can find and read this note.

        Link with GitHub

        Please authorize HackMD on GitHub
        • Please sign in to GitHub and install the HackMD app on your GitHub repo.
        • HackMD links with GitHub through a GitHub App. You can choose which repo to install our App.
        Learn more  Sign in to GitHub

        Push the note to GitHub Push to GitHub Pull a file from GitHub

          Authorize again
         

        Choose which file to push to

        Select repo
        Refresh Authorize more repos
        Select branch
        Select file
        Select branch
        Choose version(s) to push
        • Save a new version and push
        • Choose from existing versions
        Include title and tags
        Available push count

        Pull from GitHub

         
        File from GitHub
        File from HackMD

        GitHub Link Settings

        File linked

        Linked by
        File path
        Last synced branch
        Available push count

        Danger Zone

        Unlink
        You will no longer receive notification when GitHub file changes after unlink.

        Syncing

        Push failed

        Push successfully