Sounds to See - By MITK12Videos
Transcript
| 00:11 | this is Nate playing the piano . You can hear | |
| 00:17 | the music coming from the piano even though you are | |
| 00:19 | not standing next to it and you can hear my | |
| 00:22 | voice even though you cannot see me . But have | |
| 00:25 | you ever wondered what sound is ? We can hear | |
| 00:29 | the sound . But is there a way of looking | |
| 00:31 | at it even though you can't see sound in real | |
| 00:35 | life sound is produced by air particles moving back and | |
| 00:39 | forth . Here in this cartoon , each circle represents | |
| 00:43 | an air particle . As the particles move back and | |
| 00:47 | forth , the particles form dense regions where a lot | |
| 00:50 | of air particles are close together . The motion of | |
| 00:53 | these particles causes the dense regions to move in the | |
| 00:56 | direction that the sound is moving . In this case | |
| 00:59 | the sound is moving to the right . The frequency | |
| 01:03 | of the sound describes how many dense regions reach our | |
| 01:05 | air during a given time , Usually a second . | |
| 01:10 | The closer the dense regions are to each other , | |
| 01:13 | the higher the frequency of the sound and we hear | |
| 01:16 | it as a higher pitched sound mm For low pitched | |
| 01:23 | sounds , the dense regions are farther apart . In | |
| 01:31 | fact , we can show how frequency changes over time | |
| 01:35 | . In a picture . In this picture , the | |
| 01:38 | high frequencies are on the top and the low frequencies | |
| 01:41 | are on the bottom . We can also use this | |
| 01:44 | to track how the frequencies change . Yeah , okay | |
| 01:51 | . This picture is called a spectrogram . We can | |
| 01:55 | use spectrograms to look at frequencies in different kinds of | |
| 01:58 | sounds like the sounds in my speech . Now , | |
| 02:01 | I'm going to record innate saying something . Let's take | |
| 02:05 | a look at the spectrogram when Nate says E . | |
| 02:08 | E . These horizontal lines are the frequencies in the | |
| 02:13 | vowel Nate made . Those frequencies are called the performance | |
| 02:17 | of a vowel . These four men are in different | |
| 02:20 | positions on the spectrogram for different vowels . Now , | |
| 02:25 | let's see what happens when Nate says something different like | |
| 02:28 | ah uh when Nate said ah the two lowest formats | |
| 02:36 | were closer together . When Nate said E The two | |
| 02:40 | lowest form ants were farther apart . That's how you | |
| 02:43 | can tell the difference between vowels now . So numb | |
| 02:47 | is going to say the same vowels . E Uh | |
| 02:52 | huh . Look at where the formats are . Now | |
| 02:57 | . The formats are in a different place because cinemas | |
| 03:00 | voice is different from Neitz . However , you can | |
| 03:03 | still tell that Sona was saying e here because the | |
| 03:07 | formats are far apart and here . So name was | |
| 03:10 | saying ah because the formats are close together now , | |
| 03:15 | let's see what happens if we have a chipmunk saying | |
| 03:17 | the same things , he needs to come here and | |
| 03:20 | use your talents to sound like a chipmunk and oh | |
| 03:30 | you can see how it follows the same pattern . | |
| 03:33 | The Formance . E . Are far apart and the | |
| 03:36 | four months in ah are close together . These programs | |
| 03:41 | are cool . Hey , why do I still sounds | |
| 03:44 | like a chipmunk while Nate is figuring that out . | |
| 03:48 | Let's review the words we've learned . They have really | |
| 03:51 | helped us understand what sound is all about . Frequency | |
| 03:55 | , describes how lower high the sound is . Which | |
| 03:57 | depends on the spacing of the dense air regions in | |
| 04:01 | the sound wave . Spectrogram , a tool that lets | |
| 04:04 | you look at the frequencies that make up a sound | |
| 04:07 | . It also lets you see how the frequencies change | |
| 04:10 | as the sound changes for months the performance of a | |
| 04:14 | vow are the frequencies that make up the vow . | |
| 04:17 | Although the formats are positioned differently in the spectrogram for | |
| 04:20 | different voices , the pattern of the format is generally | |
| 04:24 | unique to each wall . So now I can use | |
| 04:29 | a spectrogram to see all the frequencies in my voice | |
| 04:32 | . I'm going to do that right now . I | |
| 04:35 | do there there there there there there there there there | |
| 04:47 | there we get to , wow ! We can we | |
| 04:50 | get |
Summarizer
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OVERVIEW:
Sounds to See is a free educational video by MITK12Videos.
This page not only allows students and teachers view Sounds to See videos but also find engaging Sample Questions, Apps, Pins, Worksheets, Books related to the following topics.
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