Difference between revisions of "ExpEYES/C3/Characteristics-of-Sound-Waves/English-timed"

From Script | Spoken-Tutorial
Jump to: navigation, search
Line 5: Line 5:
 
|-
 
|-
 
|00:01
 
|00:01
−
|Hello everyone.Welcome to this tutorial on '''Characteristics of Sound Waves'''.
+
|Hello everyone. Welcome to this tutorial on '''Characteristics of Sound Waves'''.
  
 
|-
 
|-
 
|00:08
 
|00:08
−
| In this tutorial we will learn to demonstrate:
+
| In this tutorial, we will learn to demonstrate:
  
 
* How to generate a sound wave
 
* How to generate a sound wave
Line 23: Line 23:
 
|-
 
|-
 
|00:29
 
|00:29
−
|And Show
+
|And, show:
  
−
* Xmgrace plots
+
* '''Xmgrace plot'''s
  
−
* Fourier Transforms and  
+
* '''Fourier Transforms''' and  
  
−
* Circuit diagrams for our experiments.
+
* '''Circuit diagram'''s for our experiments.
  
 
|-
 
|-
 
|00:38
 
|00:38
−
| Here I am using,
+
| Here I am using:
−
* '''ExpEYES''' version 3.1.0
+
* '''ExpEYES''' version '''3.1.0'''
−
* '''Ubuntu Linux''' OS version 14.10
+
* '''Ubuntu Linux''' OS version '''14.10'''
  
 
|-
 
|-
 
|00:49
 
|00:49
−
| To follow this tutorial, you should be familiar with:
+
| To follow this tutorial, you should be familiar with '''ExpEYES Junior''' interface. If not, for relevant tutorials, please visit our website.  
−
'''ExpEYES Junior''' interface.If not, for relevant tutorials, please visit our website.  
+
  
 
|-
 
|-
Line 50: Line 49:
 
|-
 
|-
 
|01:13
 
|01:13
−
|It requires a medium to propagate.The medium can be air, water or any metal surface.
+
|It requires a medium to propagate. The medium can be air, water or any metal surface.
  
 
|-
 
|-
 
|01:22
 
|01:22
−
| In this tutorial we will carry out various experiments to show characteristics of sound waves.
+
| In this tutorial, we will carry out various experiments to show characteristics of sound waves.
  
 
|-
 
|-
Line 68: Line 67:
 
|-
 
|-
 
|01:44
 
|01:44
−
|'''Microphone(MIC)''' is connected to '''A1'''.Here '''Piezo buzzer(PIEZO)''' is a source of sound.
+
|'''Microphone(MIC)''' is connected to '''A1'''. Here '''Piezo buzzer(PIEZO)''' is a source of sound.
 
This is the circuit diagram.
 
This is the circuit diagram.
  
Line 81: Line 80:
 
|-
 
|-
 
|02:07
 
|02:07
−
| Click on '''SQR1''' check box.Frequency of '''SQR1''' is set to ''3500Hz''. A digitized sound wave is generated.
+
| Click on '''SQR1''' check box. Frequency of '''SQR1''' is set to ''3500Hz''. A digitized sound wave is generated.
  
 
|-
 
|-
Line 89: Line 88:
 
|-
 
|-
 
|02:27
 
|02:27
−
| Click on '''SQ1''' and drag to''' CH2'''.Input data of '''SQ1''' is assigned to '''CH2'''.A square wave is generated.
+
| Click on '''SQ1''' and drag to''' CH2'''. Input data of '''SQ1''' is assigned to '''CH2'''. A square wave is generated.
  
 
|-
 
|-
Line 97: Line 96:
 
|-
 
|-
 
|02:48
 
|02:48
−
| Click on '''CH2 '''and drag to '''FIT'''.Voltage and frequency of '''SQ1''' is displayed on the right-side.
+
| Click on '''CH2 '''and drag to '''FIT'''. Voltage and frequency of '''SQ1''' is displayed on the right-side.
  
 
|-
 
|-
 
|02:59
 
|02:59
−
| Move the '''frequency''' slider to set in '''sound waves'''
+
| Move the '''frequency''' slider to set in '''sound waves'''.
  
 
|-
 
|-
Line 117: Line 116:
 
|-  
 
|-  
 
|03:24
 
|03:24
−
| On the '''Plot window''' click on '''EXPERIMENTS''' button.'''Select Experiment''' list opens.Click on ''' Frequency Response''' from the list.
+
| On the '''Plot window''' click on '''EXPERIMENTS''' button. '''Select Experiment''' list opens. Click on ''' Frequency Response''' from the list.
  
 
|-
 
|-
 
|03:39
 
|03:39
−
| Two new windows '''Audio Frequency response Curve''' and '''Schematic''' open.'''Schematic''' window shows, circuit diagram of the experiment.
+
| Two new windows '''Audio Frequency response Curve''' and '''Schematic''' open. '''Schematic''' window shows, circuit diagram of the experiment.
  
 
|-
 
|-
 
|03:52
 
|03:52
−
| On the '''Audio Frequency response Curve''' window click on ''' START''' button.
+
| On the '''Audio Frequency response Curve''' window, click on ''' START''' button.
  
 
|-
 
|-
 
|03:59
 
|03:59
−
| '''Frequency response''' of the '''Piezo buzzer''' is set in.'''Frequency response''' has maximum '''amplitude''' at ''3700Hz''.  
+
| '''Frequency response''' of the '''Piezo buzzer''' is set in. '''Frequency response''' has maximum '''amplitude''' at ''3700Hz''.  
  
 
|-
 
|-
 
|04:11
 
|04:11
−
| On the same window click on '''Grace''' button.'''Grace''' window opens showing '''Frequency response Curve'''
+
| On the same window, click on '''Grace''' button. '''Grace''' window opens showing '''Frequency response Curve'''.
  
 
|-
 
|-
Line 141: Line 140:
 
|-
 
|-
 
|04:27
 
|04:27
−
| On the '''Plot window''' click on '''EXPERIMENTS''' button.
+
| On the '''Plot window''', click on '''EXPERIMENTS''' button.
−
'''Select Experiment''' list opens.Click on '''Velocity of Sound''' from the list.
+
'''Select Experiment''' list opens. Click on '''Velocity of Sound''' from the list.
 
|-
 
|-
 
|04:41
 
|04:41
−
|Two new windows '''EYES Junior: Velocity of Sound''' and '''Schematic''' open.'''Schematic''' window shows the circuit diagram of the experiment.
+
|Two new windows '''EYES Junior: Velocity of Sound''' and '''Schematic''' open. '''Schematic''' window shows the circuit diagram of the experiment.
  
 
|-
 
|-
 
|04:55
 
|04:55
−
| On '''EYES Junior: Velocity of Sound''' window click on '''Measure Phase''' button.
+
| On '''EYES Junior: Velocity of Sound''' window, click on '''Measure Phase''' button.
  
 
|-
 
|-
Line 161: Line 160:
 
|-
 
|-
 
|05:16
 
|05:16
−
|From the various '''Phase''' values we will use ''178deg'' and ''106deg'' to calculate velocity of sound.
+
|From the various '''Phase''' values, we will use ''178deg'' and ''106deg'' to calculate velocity of sound.
  
 
|-
 
|-
Line 173: Line 172:
 
|-
 
|-
 
|05:45
 
|05:45
−
| To calculate the value of '''velocity of sound''',we have the formula as shown:
+
| To calculate the value of '''velocity of sound''', we have the formula as shown.
 
Velocity of sound obtained from the experiment is 350m/sec.
 
Velocity of sound obtained from the experiment is 350m/sec.
  
 
|-
 
|-
 
|05:59
 
|05:59
−
|As an assignment, calculate the value of '''wavelength''' of sound.Formula: '''λ= v/f'''.
+
|As an assignment, calculate the value of '''wavelength''' of sound. Formula: '''λ= v/f'''.
  
 
|-
 
|-
Line 193: Line 192:
 
|-
 
|-
 
|06:20
 
|06:20
−
| To show '''Grace''' plots in the experiments:
+
| To show '''Grace''' plots in the experiments,
  
 
|-
 
|-
 
|06:23
 
|06:23
−
|Make sure that you have installed
+
|make sure that you have installed:
  
 
* python-imaging-tk
 
* python-imaging-tk
Line 209: Line 208:
 
|-
 
|-
 
|06:34
 
|06:34
−
|In this experiment we use two Piezo buzzers as source of sound.  
+
|In this experiment, we use two Piezo buzzers as source of sound.  
  
 
|-
 
|-
 
|06:41
 
|06:41
−
| In this experiment '''Piezo 1''' is connected to '''SQR1''' and ground'''(GND)'''.'''Piezo 2''' is connected to '''SQR2''' and ground'''(GND)'''.This is the circuit diagram.
+
| In this experiment '''Piezo 1''' is connected to '''SQR1''' and ground'''(GND)'''. '''Piezo 2''' is connected to '''SQR2''' and ground'''(GND)'''. This is the circuit diagram.
  
 
|-
 
|-
Line 225: Line 224:
 
|-
 
|-
 
|07:06
 
|07:06
−
|Click on '''SQR1''' and '''SQR2''' check boxes.Frequency of '''SQR1 '''and''' SQR2''' is set to “3500Hz”.  
+
|Click on '''SQR1''' and '''SQR2''' check boxes. Frequency of '''SQR1 '''and''' SQR2''' is set to “3500Hz”.  
  
 
|-
 
|-
Line 237: Line 236:
 
|-
 
|-
 
|07:29
 
|07:29
−
|Click on '''EXPERIMENTS''' button and select '''Interference of Sound'''.'''EYES: Interference of Sound''' window opens.
+
|Click on '''EXPERIMENTS''' button and select '''Interference of Sound'''. '''EYES: Interference of Sound''' window opens.
  
 
|-
 
|-
 
|07:39
 
|07:39
−
|At the bottom of the window, change '''NS''' that is '''number of samples''' value to ''1000''.
+
|At the bottom of the window, change '''NS''', that is, '''number of samples''' value to ''1000''.
  
 
|-
 
|-
 
|07:48
 
|07:48
−
|Click on '''SQR1''' and '''SQR2''' check boxes.Click on '''START''' button.'''Interference''' pattern is seen.  
+
|Click on '''SQR1''' and '''SQR2''' check boxes. Click on '''START''' button. '''Interference''' pattern is seen.  
  
 
|-
 
|-
 
|08:00
 
|08:00
−
|Now click on '''Xmgrace''' button.A new window opens with a '''Grace''' pattern.
+
|Now click on '''Xmgrace''' button. A new window opens with a '''Grace''' pattern.
  
 
|-
 
|-
Line 262: Line 261:
 
|-
 
|-
 
|08:20
 
|08:20
−
| At the bottom of the window, Click on '''SQR1 '''and '''SQR2''' check boxes.
+
| At the bottom of the window, click on '''SQR1 '''and '''SQR2''' check boxes.
  
 
|-
 
|-
 
|08:28
 
|08:28
−
|Click on '''START''' button.'''Beats''' pattern appears.
+
|Click on '''START''' button. '''Beats''' pattern appears.
  
 
|-
 
|-
 
|08:33
 
|08:33
−
|Now click on '''Xmgrace''' button.A new window opens with a '''Grace''' pattern.
+
|Now, click on '''Xmgrace''' button. A new window opens with a '''Grace''' pattern.
  
 
|-
 
|-
 
|08:42
 
|08:42
−
| Click on '''FFT'''.A new window opens with '''Fourier Transform'''.
+
| Click on '''FFT'''. A new window opens with '''Fourier Transform'''.
  
 
|-
 
|-
 
|08:49
 
|08:49
−
|To know more about '''Fourier Transform ''' please visit this webpage.'''https://en.wikipedia.org/wiki/Fourier_transform'''.
+
|To know more about '''Fourier Transform ''', please visit this webpage.
 +
'''https://en.wikipedia.org/wiki/Fourier_transform'''.
  
 
|-
 
|-
 
|08:55
 
|08:55
−
|Let us perform an experiment to show a low frequency sound wave.This is the circuit diagram.
+
|Let us perform an experiment to show a low frequency sound wave. This is the circuit diagram.
  
 
|-
 
|-
 
|09:03
 
|09:03
−
| Click on '''EXPERIMENTS''' button and select '''Interference of Sound'''.'''EYES: Interference of Sound''' window opens.
+
| Click on '''EXPERIMENTS''' button and select '''Interference of Sound'''. '''EYES: Interference of Sound''' window opens.
  
 
|-
 
|-
Line 306: Line 306:
 
|-
 
|-
 
|09:36
 
|09:36
−
|In this tutorials we have learnt to demonstrate:
+
|In this tutorial, we have learnt to demonstrate:
  
 
* How to generate a sound wave
 
* How to generate a sound wave
Line 320: Line 320:
 
|-
 
|-
 
|09:56
 
|09:56
−
|And have shown:
+
|And, have shown:
  
 
* Xmgrace plots  
 
* Xmgrace plots  
Line 330: Line 330:
 
|-
 
|-
 
| 10:04
 
| 10:04
−
|As an Assignment,
+
|As an Assignment-
  
 
* Capture a sound burst  
 
* Capture a sound burst  
  
−
* Hint: A bell or a clap can be used as source of sound.This is the circuit diagram.
+
Hint: A bell or a clap can be used as source of sound. This is the circuit diagram.
  
 
|-
 
|-
 
|10:15
 
|10:15
−
|This video summarizes the Spoken Tutorial project.If you do not have good bandwidth, you can download and watch it.
+
|This video summarizes the Spoken Tutorial project. If you do not have good bandwidth, you can download and watch it.
  
 
|-
 
|-
 
|10:24
 
|10:24
−
|We conduct workshops using Spoken Tutorials and give certificates.Please contact us.
+
|We conduct workshops using Spoken Tutorials and give certificates. Please contact us.
  
 
|-
 
|-
 
|10:32
 
|10:32
−
|The Spoken Tutorial Project is funded by '''NMEICT, MHRD''' '''Government of India'''.
+
|The Spoken Tutorial Project is funded by NMEICT, MHRD Government of India.
  
 
|-
 
|-
 
|10:40
 
|10:40
−
|This tutorial is contributed by Kaushik Datta and Madhuri Ganapathi.This is Sakina Sidhwa. Thank you for joining.
+
|This tutorial is contributed by Kaushik Datta and Madhuri Ganapathi. This is Sakina Sidhwa.
 +
Thank you for joining.
  
 
|}
 
|}

Revision as of 23:12, 12 May 2016

Time Narration
00:01 Hello everyone. Welcome to this tutorial on Characteristics of Sound Waves.
00:08 In this tutorial, we will learn to demonstrate:
  • How to generate a sound wave
  • Frequency response of a sound source
  • How to calculate velocity of sound
  • Interference and Beats of sound waves
  • Forced oscillations of a sound source.
00:29 And, show:
  • Xmgrace plots
  • Fourier Transforms and
  • Circuit diagrams for our experiments.
00:38 Here I am using:
  • ExpEYES version 3.1.0
  • Ubuntu Linux OS version 14.10
00:49 To follow this tutorial, you should be familiar with ExpEYES Junior interface. If not, for relevant tutorials, please visit our website.
01:01 Let's first begin with definition of Sound.

Sound is a vibration that propagates as an audible mechanical wave of pressure & displacement.

01:13 It requires a medium to propagate. The medium can be air, water or any metal surface.
01:22 In this tutorial, we will carry out various experiments to show characteristics of sound waves.
01:30 Let's perform an experiment to show frequency of sound waves.
01:35 In this experiment, ground(GND) is connected to Piezo buzzer(PIEZO).

Piezo buzzer(PIEZO) is connected to SQR1.

01:44 Microphone(MIC) is connected to A1. Here Piezo buzzer(PIEZO) is a source of sound.

This is the circuit diagram.

01:55 Let's see the result on the Plot window.
01:59 On the Plot window, under Setting Square waves, set the frequency as 3500Hz.
02:07 Click on SQR1 check box. Frequency of SQR1 is set to 3500Hz. A digitized sound wave is generated.
02:20 Move the frequency slider to change the waveform.
02:27 Click on SQ1 and drag to CH2. Input data of SQ1 is assigned to CH2. A square wave is generated.
02:40 Drag the mSec/div slider to set in compressions and rear-fractions.
02:48 Click on CH2 and drag to FIT. Voltage and frequency of SQ1 is displayed on the right-side.
02:59 Move the frequency slider to set in sound waves.
03:04 Sound wave produced by the Piezo buzzer is shown in black colour.
03:10 Amplitude of the wave changes as Piezo buzzer is moved closer and away from the MIC respectively.
03:19 Now we will demonstrate frequency response of Piezo buzzer.
03:24 On the Plot window click on EXPERIMENTS button. Select Experiment list opens. Click on Frequency Response from the list.
03:39 Two new windows Audio Frequency response Curve and Schematic open. Schematic window shows, circuit diagram of the experiment.
03:52 On the Audio Frequency response Curve window, click on START button.
03:59 Frequency response of the Piezo buzzer is set in. Frequency response has maximum amplitude at 3700Hz.
04:11 On the same window, click on Grace button. Grace window opens showing Frequency response Curve.
04:22 Now we will measure velocity of the source of sound.
04:27 On the Plot window, click on EXPERIMENTS button.

Select Experiment list opens. Click on Velocity of Sound from the list.

04:41 Two new windows EYES Junior: Velocity of Sound and Schematic open. Schematic window shows the circuit diagram of the experiment.
04:55 On EYES Junior: Velocity of Sound window, click on Measure Phase button.
05:02 We can obtain different Phase values by changing the distance between MIC and Piezo buzzer.
05:11 Click Measure Phase button to obtain different Phase values.
05:16 From the various Phase values, we will use 178deg and 106deg to calculate velocity of sound.
05:28 We can obtain these values when Piezo is kept close and 2cm away from the MIC.
05:37 To obtain accurate results, ensure that MIC and Piezo buzzer are placed on the same axis.
05:45 To calculate the value of velocity of sound, we have the formula as shown.

Velocity of sound obtained from the experiment is 350m/sec.

05:59 As an assignment, calculate the value of wavelength of sound. Formula: λ= v/f.
06:09 Now we will demonstrate:
  • Interference
  • Beats
  • Xmgrace plot and
  • Fourier Transform of the two sources of sound.
06:20 To show Grace plots in the experiments,
06:23 make sure that you have installed:
  • python-imaging-tk
  • grace
  • scipy and
  • python-pygrace on your system.
06:34 In this experiment, we use two Piezo buzzers as source of sound.
06:41 In this experiment Piezo 1 is connected to SQR1 and ground(GND). Piezo 2 is connected to SQR2 and ground(GND). This is the circuit diagram.
06:56 Let's see the result on the Plot window.
07:00 On the Plot window, set frequency as 3500Hz.
07:06 Click on SQR1 and SQR2 check boxes. Frequency of SQR1 and SQR2 is set to “3500Hz”.
07:20 A digitized sound wave is generated.
07:24 Move the frequency slider to change the waveform.
07:29 Click on EXPERIMENTS button and select Interference of Sound. EYES: Interference of Sound window opens.
07:39 At the bottom of the window, change NS, that is, number of samples value to 1000.
07:48 Click on SQR1 and SQR2 check boxes. Click on START button. Interference pattern is seen.
08:00 Now click on Xmgrace button. A new window opens with a Grace pattern.
08:08 Now we will show Beats pattern.
08:11 Click on EXPERIMENTS button and select Interference of Sound.

EYES: Interference of Sound window opens.

08:20 At the bottom of the window, click on SQR1 and SQR2 check boxes.
08:28 Click on START button. Beats pattern appears.
08:33 Now, click on Xmgrace button. A new window opens with a Grace pattern.
08:42 Click on FFT. A new window opens with Fourier Transform.
08:49 To know more about Fourier Transform , please visit this webpage.

https://en.wikipedia.org/wiki/Fourier_transform.

08:55 Let us perform an experiment to show a low frequency sound wave. This is the circuit diagram.
09:03 Click on EXPERIMENTS button and select Interference of Sound. EYES: Interference of Sound window opens.
09:13 At the bottom of the window, set the value of SQR1 to 100 and check the box.
09:21 Click on START button, a low amplitude wave is displayed.
09:29 Click on FFT to obtain a Grace plot of Fourier Transform.
09:34 Let's summarize.
09:36 In this tutorial, we have learnt to demonstrate:
  • How to generate a sound wave
  • Frequency response of a sound source
  • How to calculate velocity of sound waves
  • Interference and Beat pattern of sound waves
  • Forced oscillations of sound source.
09:56 And, have shown:
  • Xmgrace plots
  • Fourier Transforms and
  • Circuit diagrams for our experiments.
10:04 As an Assignment-
  • Capture a sound burst

Hint: A bell or a clap can be used as source of sound. This is the circuit diagram.

10:15 This video summarizes the Spoken Tutorial project. If you do not have good bandwidth, you can download and watch it.
10:24 We conduct workshops using Spoken Tutorials and give certificates. Please contact us.
10:32 The Spoken Tutorial Project is funded by NMEICT, MHRD Government of India.
10:40 This tutorial is contributed by Kaushik Datta and Madhuri Ganapathi. This is Sakina Sidhwa.

Thank you for joining.

Contributors and Content Editors

Madhurig, Pratik kamble, Sandhya.np14

Retrieved from "https://script.spoken-tutorial.org/index.php?title=ExpEYES/C3/Characteristics-of-Sound-Waves/English-timed&oldid=26675"