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Book Distortion: The Cause Of Harmonics And The Lie Of THD

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Distortion: The Cause Of Harmonics And The Lie Of THD

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    Available in PDF - DJVU Format | Distortion: The Cause Of Harmonics And The Lie Of THD.pdf | Language: English

Where do harmonics come from? Distortion, right? But how? What creates harmonics? What kind of distortion causes which harmonics? Is there any way to reconcile a good THD spec but poor quality sound? Is THD, a specification derived in the 1950s, really the right way to assign a stamp of quality to an electronic product designed and produced 60 years later? This book answers all those questions to show that your professors lied to you. They had no answer to the question of where harmonics come from other than "distortion". Filled with new information using the latest techniques in Digital Signal Processing and new, low noise instrumentation, and filled with hyperlinks to videos proving its case, this book breaks new ground in proving that harmonic distortion can be explained by one simple formula. And yet this book keeps the math simple. There is no calculus or other difficult to grasp concepts. Everything you need know is explained either in the text or in one of the linked videos that were made for the book. If you can calculate the area of a rectangle, you can understand the contents of this book.

If you are frustrated in your studies of audio and RF electronics with the vague, unsubstantiated and sometimes contradictory texts on Harmonic Distortion (like Wikipedia which is totally wrong) then this book is for you. New studies with high precision instrumentation and mathematical models prove that harmonics are not well understood by anyone in the world today, except for the author and the readers of this book. I love books, and one day, volunteering at a library book sale, I picked up an electronics book. I flipped to the index, looked for Harmonics and laughed my head off. Every book out there is WRONG, here is what this one said, [my comments in brackets]."For example, theoretically speaking, [meaning, I'm taking a wild guess here because I really don't know, nobody does] a square wave contains all harmonics, but predominantly odd harmonics [WRONG! A square wave contains only odd harmonics if the duty cycle is exactly 50%, if the duty cycle is anything other than 50%, it will also contain even harmonics]By applying a square wave to an integrator, the odd harmonics are removed, leaving the even harmonics in the form of a triangle wave. [WRONG! A triangle wave works the same way, so a 50% Trise/Ttotal triangle wave will have only odd harmonics, and if the rise/fall ratio becomes anything other than 1:1, even harmonics will appear and I have the formula]"Interestingly, when relating this example to a friend he said "Well, it probably was an older book." Hell, it could have been printed this year, every other book out there is dead WRONG on harmonics, I am the only one who actually knows the formula for harmonic distortion, and it's pretty much just geometry, no calculus involved. It's so simple you will hate yourself for not figuring it out.

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Book details

  • PDF | 96 pages
  • CreateSpace Independent Publishing Platform; 1 edition (April 28, 2015)
  • English
  • 4
  • Engineering & Transportation

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Review Text

  • By Charles Fedonczak on November 12, 2017

    An insightful and well researched treatise on the subject of signal distortion. This is the first work that explains the effects of both amplitude-related and time-related signal distortion and how each contributes to the harmonic content of a signal. The author has taken a relatively complex subject and presented it in such a way as to make it accessible to even the moderately technical reader. A valuable reference for anyone involved in audio: design engineers, recording engineers, sound mixers, and audiophiles alike.

  • By David Reynolds on February 16, 2017

    The author takes a fresh look at the causes of distortion and discovers that many long held beliefs about distortion are myths. Furthermore, the most used metric of distortion can be totally misleading and ought to be replaced. This is a simple look at an intimidating topic by someone who has worked in electronics for most of his life.


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