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This module explains some of the physical aspects of sound in a format that is accessible to blind students.

Table of contents

Preface

This module is part of a collection titled Accessible Objected-Oriented Programming Concepts for Blind Students using Java . It explains some of the physical aspects of sound ina format that is accessible to blind students. It also explains a little about the trigonometric sine and cosine functions and suggests that they canbe used to create sound with a computer. An audio file is provided where audio pulses of different frequencies are used to represent points on agraph of a sinusoid.

General background information

By this point in the course, you should have learned enough that you can put Java OOP to work in a substantive way. Normally at this point, mysighted students would begin using OOP to manipulate the pixels and colors in digital images. That is not well suited to teaching OOP to blind students.In this course, which is designed specifically for blind students, you will begin writing substantive programs that deal with something that you areprobably very good at -- sound.

For example, you will soon learn how to write a Java OOP program to produce simple sounds such as TonesStereo .

(Note that if you are viewing the HTML version of this module on the Legacy site, you should be able to download this file and the other audio files in thismodule and play them using any standard media player that supports audio files of type AU. However, if you are on the OpenStax site, or ifyou are viewing the PDF version of this module on either site, you may not be able to download the file.)

As you study future modules in this collection, you will learn to write OOP programs to produce more complex sounds such as StereoPingpong .

Ultimately you will learn to write OOP programs that can be used to compose and play various melodies such as the following:

Discussion

What is sound ?

An old physics question goes something like this. If the earth were populatedsolely by humans and a tree fell in the forest with no humans present, would it make a sound?

The answer is "No, it would not make a sound." The explanation follows.

Vibration

Assume that someone strikes the top of a car with their hand. This would cause the metal roof of the car to startvibrating. That vibration would cause the adjacent air molecules to also vibrate causing them to collide with their neighbors. Those molecules would collide withtheir neighbors, and on and on. We can think of this as a wave of vibrating molecules propagating outward from the car.

This wave of vibrating molecules propagates outward at a speed of approximately one mile every five seconds and decreases in intensity as itpropagates out from the source. At some distance from the source, the intensity of the vibrations has decreased to an insignificant level.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Accessible objected-oriented programming concepts for blind students using java. OpenStax CNX. Sep 01, 2014 Download for free at https://legacy.cnx.org/content/col11349/1.17
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