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A template for evaluating functions

In addition to the AudioGraph generator program named MusicComposer10 , this module also develops a simple template for writing programs to evaluate functions and to write theresults into a text file. The zip file mentioned earlier contains the source code for programs to evaluate all of the functions in the above list . This template is so simple that a student with minimal programming knowledge could easily write her ownprograms to evaluate other functions. I will explain the template later .

The audio pulse rate

You may have noticed that the output pulses in most of the audio files in the above list are delivered to the speakers at a fairly rapid rate. The output pulse rate (in pulses per second) is specified by the user as a command-line parameter when the program is run. (Most of the examples in the above list were run at 12 pulses per second but Sinusoid01 was run at only 5 pulses per second.) An overview of the output from a function can be achieved using a fast output pulse rate. A more detailed audio analysis of the outputcan then be achieved by running the program with a slower output rate. And, if you need to do detailed numeric analysis, the numeric data is available forexamination in the corresponding text file.

Play or file ?

Another user input parameter specifies whether the melody is to be played immediately or is to be saved in an audio file for playback later. Saving it inan audio file makes it very convenient to listen to over and over to allow the information content to "sink into" the brain. In addition, a student can buildup a library of audio files for different functions for review later, such as when studying for a test.

Not a substitute for an embossed image

An AudioGraph is not a substitute for an embossed image of a graph. However, it may be much quicker and easier to produce, it may tell you if you need totake the time and effort to create an embossed image, and it may enhance the learning process even if you do produce an embossed image.

For the benefit of those students who have the ability to produce embossed images, the Figures section provides an image for each AudioGraph listed above . In addition, the downloadable zip file contains the JPEG files for those images.

Discussion and sample code

The program named Sinc01

Since this module is all about evaluating functions, I will begin with an explanation of the template that I have developed to evaluate a function and to writethe results of the evaluation into an output text file. A complete listing of the program named Sinc01 is provided in Listing 16 . As is my custom, I will break the program down and explain it in fragments.

This program produces an output text file containing values for y as a function of x for the so called sinc function (more on this later) .

The contents of the text file can be converted into audio and either played or written into an audio file of type AU for playback later using the programnamed AudioGraph01 .

A sinc function

The function that is evaluated by this program is the classic sin(x)/x function, otherwise known a the sinc function. It appears frequently in digital signal processing (DSP) and is one ofmy favorites.

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..
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
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.
yes that's correct
I think
Nasa has use it in the 60's, copper as water purification in the moon travel.
nanocopper obvius
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
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
analytical skills graphene is prepared to kill any type viruses .
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
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