Sound Analysis

The sound analysis lab suite involves your making recordings of three distinct sounds and subsequently analyzing those sounds. The expected final result is a word processor document on your disk which includes a portfolio of 12 images related to your sounds plus the necessary text to describe that analysis. Six of those images are to be produced with the DataStudio software on the laboratory computers and patched into your word processor document with descriptive text. The other six images will be provided to you on your disc from another analog-to-digital converter, giving you an independent set of analysis images.

声音分析实验室套件包括你录制三种不同的声音并随后分析这些声音。预期的最终结果是你的磁盘上的一个文字处理器文档，其中包括与你的声音相关的12张图片的集合以及描述该分析的必要文字。其中六张图片必须使用实验室计算机上的DataStudio软件生成，并与描述性文字一起插入到你的文字处理器文档中。另外六张图片将从另一台模拟-数字转换器提供给你，给你一个独立的分析图片集合。

After you have the digitized sound files on your disk, the next task is to analyze those sound files to fill out the data sheet with information about their frequency, etc. The data is to then be transferred from the data sheet to your report. The following comments may help with the process of analyzing the sound files.

在将数字声音文件保存到磁盘后，下一步任务是分析这些声音文件，以填写数据表，获取其频率等信息。然后将这些数据从数据表转移到你的报告中。以下评论可能有助于分析声音文件的过程。

NOTE: Be sure to save all files to YOUR DISK! The lab computers are regularly purged of all saved files.

请注意：请将所有文件保存到您的硬盘！实验室的电脑会定期清除所有已保存的文件。

1. Open the DataStudio software on your computer and open one of your sound files from your disk.

在你的电脑上打开DataStudio软件，并从你的硬盘中打开一个声音文件。

a. Use the DataStudio features to fill out your data sheet for that sound. That is, make a graph of the sound, make the indicated measurements on the waveform, calculate its frequency and indicate the nearest equal tempered note from the table.

使用DataStudio功能填写该声音的数据表。也就是说，绘制该声音的波形图，对波形进行标注测量，计算其频率，并从表中确定最接近的等音律音高。

b. Click the data transfer icon and then double click "Graph" to make a graph of your waveform. Adjust the display of the waveform so that it has the appearance you want in your portfolio of images. Generally this involves using the Display menu to remove the icons and the legend which clutter up the picture. You can also adjust the height and width of the display by finding the vertical and horizontal "handles" just above the "voltage" and "time" labels to adjust the display.

b. 点击数据传输图标，然后双击"Graph"以生成波形图。调整波形的显示，使其在您的图像集合中具有您期望的外观。通常这涉及使用显示菜单去除图标和图例，以减少画面的杂乱。您还可以通过找到位于"电压"和"时间"标签上方的垂直和水平" handles"来调整显示区域的大小。

2. Open the word processor by going to Open/Programs/Microsoft Word. Give the document a heading and save it as you laboratory document on your disk. This will be the document which will constitute your report for this lab sequence.

打开Word程序：通过打开/程序/Microsoft Word进入Word。给文档添加标题，并将文档保存到您的磁盘上，命名为您的实验报告文档。这个文档将作为本实验序列的报告。

3. Returning to the DataStudio display, choose Display/Export Picture. Save the picture on your disk with a recognizable name. It will save as a .BMP file which takes too much memory, so it will be practical to transfer the images into your word processor document and then delete the BMP files to avoid filling up your disk. (You can probably get away with two or three BMP images before doing the transfer if you want to organize your time that way.)

4. To patch your image into your word processor document, return to your Word document and select the point at which you want the image. Then choose "Insert/Picture/from File.." and select the image. Click the "Insert" button to insert it in your Word document. Resave the document. After confirming that the new file is in your report document and is resaved, delete the old file to save disk space. You can go to My Computer/Disk A:3.5" floppy to find the icon for the image to delete.

为了将图像插入到Word文档中，回到你的Word文档，选择你希望插入图像的位置。然后选择'插入/图片/从文件'，并选择图像。点击'插入'按钮将图像插入到Word文档中。保存文档。确认新文件已插入到报告文档中并已重新保存后，删除旧文件以节省磁盘空间。你可以前往我的计算机/磁盘A:3.5英寸软盘找到要删除的图像图标。

回到DataStudio显示界面，选择显示/导出图片。将图片保存到您的磁盘上，并使用一个易于识别的名称。它会保存为一个.BMP文件，这会占用大量内存，因此将图片传输到您的文字处理器文档中，然后删除.BMP文件以避免填满磁盘是更实际的做法。（如果您想那样安排时间，可能可以保留两个或三个.BMP文件再进行传输。）

5. Returning to DataStudio with the same sound file, choose FFT and display the plot of your sound as a function of frequency. Repeat the image capturing and pasting routine to put that into your report.

回到DataStudio，使用相同的音频文件，选择FFT并绘制音频信号随频率变化的曲线。重复图像捕捉和粘贴的步骤，将该图放入你的报告中。

6. Transfer the data for that sound from your data sheet to complete the description of that sound.