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Sound Reproduction: Loudspeakers and Rooms - Floyd E. Toole - Google Books
Floyd blogger.com, arguably the world's leading authority on loudspeakers, pdf 1. contents Audio Engineering: Science in the Service of Art By Floyd E. Toole Speakers: Reproduction in whole or in part is prohibited without the prior written per. Explore a preview version of Sound Reproduction right now.. O’Reilly members get unlimited access to live online training experiences, plus books, videos, and digital content from + publishers. A better definition of sound quality would serve as a guide post for those seeking audio nirvana, and I do not think one can find a better explanation of this criterion called ‘sound quality’ than Dr. Floyd E. Toole’s latest book, ‘Sound Reproduction: The Acoustic and Psychoacoustics of Loudspeakers and Rooms, 3rd Edition’. It is more Author: James Larson.
Sound reproduction floyd toole pdf download
Floyd E. It is more than just an introduction to sound reproduction and sound quality; it is a comprehensive explanation of all of the components that add up to sound quality, and how that quality can be good or go wrong, sound reproduction floyd toole pdf download.
The recently released 3rd edition is a major re-ordering and rewrite that is updated with much of the latest advances in research and technology on the subjects that are covered.
The subtitle, "the Acoustics and Psychoacoustics of Loudspeakers and Rooms," touches on the chief components that determine the quality of the sound reproduction. Let's expand on that subtitle: 'acoustics' is the science of the pressure waves of air that we hear as sound, and the need for that in ascertaining good sound reproduction is obvious.
It is a technical endeavor and therefore has to have some means of being quantified. But acoustics alone is not enough to determine sound quality; humans are not robots and do not hear in the same way that a microphone 'hears. As its name suggests, psychoacoustics is the bridging of psychology perception and physical acoustics. Clearly, this area of research is needed if we wish sound reproduction floyd toole pdf download understand sound reproduction in an enjoyable or accurate way as a human activity.
The 'Room' is as much a part of any sound system as any other component, since it is the interaction of the room with the loudspeaker that is what we hear and not the loudspeakers alone. We sense the pressure waves of air acoustics generated by the loudspeakers as those pressure waves are shaped by the room and perceive it as sound psychoacoustics.
Image of Dr. Floyd Toole's current LCR sound reproduction floyd toole pdf download in his personal listening space includes two inverted Revel Salon2s to put the sound image where it belongs and a Voice2 center. Speakers are driven by Mark Levinson s amplifiers. The front projection screen is outlined. Note the room looks like an art gallery, not a home theater, sound reproduction floyd toole pdf download.
Superb loudspeakers, multiple subs with SFM no bass traps needed and stealth acoustical treatments allow for excellent sound and aesthetics. He uses a scientific approach into apprehending what traits that a sound system should have to sound good to people and why it does sound good to them.
One interesting finding of his research is that what many people think sounds good is also the same thing as accurate sound; that is, the closer that an audio system can reproduce the recording to its intended sound, ie. Thankfully, for the sake of simplicity, this is not the case, and the research has shown the most desirable sound for most people is the same thing as the most accurate sound. If you start with neutral loudspeakers all options are possible. Since we have established desirable sound is also accurate sound, that simplifies the traits that our audio system must have to have good sound quality.
It should reproduce the content as faithfully as possible. Perfect audio fidelity to the source content is impossible in real world conditions, but we should get as close as we can. The most important element that a sound system should have to maintain veracity to the source content is its frequency response.
The frequency response is the amplitude a system reproduces different frequencies where the incoming signal has the same amplitude for all frequencies. A more relatable way to state that is frequency response is how evenly a system will reproduce all frequencies in the audible spectrum, from the deepest bass to the highest treble that humans can hear.
The more evenly a system can playback sound at all frequencies, sound reproduction floyd toole pdf download, the more accurately it is able to reproduce sound reproduction floyd toole pdf download content of recordings. This is critical stuff for evaluating the performance metrics of an audio system, and a deep understanding of it can allow one to know what an audio system can sound like simply from looking at a detailed set of its frequency response measurements.
The reason for this is the loudspeaker is going to affect the sound far more than the other components. Unless those other components are of exceptionally bad engineering, they will convey the source sound reproduction floyd toole pdf download, at least as far as human perception is concerned. The loudspeaker is the weak link. A loudspeaker is only part of the equation for sound quality, and the other major component that affects the resultant sound is the room.
The room acoustics will have a profound effect on the sound, in some cases for the better and other cases for the worse, especially at low frequencies. Toole explains in detail how the loudspeakers can behave in the acoustic situations of both normal and treated rooms, and how human hearing perception responds to room acoustics.
Humans can hear the rooms, and we can also hear through the rooms, that is to say, we can quickly adapt to room acoustics and hear the sound signature of the source of acoustic emission beyond the room acoustics. A room will shape the sound of the loudspeaker in it, but we can still hear how well the loudspeaker is performing after our hearing has acclimated to the acoustics, which usually occurs very quickly.
However, some acoustic environments will take a greater toll on the emitted sound than others, and Dr. Toole elucidates some of the actions that can be done to cope with suboptimal room conditions. One subject brought up throughout the book is what Dr. What is the point of achieving a near-perfect audio system when the content that it reproduces can vary so wildly due to the fact that there was no consistent reference point by which they were reproduced?
One startling fact that Dr. Toole discusses is how badly flawed many of the monitoring systems are that were used in recording and mastering studios.
If the audio systems that were used to mix and master the recordings had a poor frequency response, the sound engineers will be creating a sound mix that sounds good on that particular system, but when that sound mix is re produced on a system that is far more accurate and linear, it can sound odd, since it was created with inherent compensations for an acceptable sound on a problematic sound system to begin with.
Hearing loss will most commonly occur as a reduction in high-frequency sensitivity, so sound engineers can end up boosting high-frequencies to compensate for their hearing, and that can leave the sound mix to sound reproduction floyd toole pdf download blazing hot in treble for those of us with good hearing.
This brings me to another point that Dr. OSHA noise exposure criteria actually allows for a substantial amount of hearing damage to occur. Just when I think I am becoming too cynical, I find out I am not cynical enough! Something else sound reproduction floyd toole pdf download Dr.
Toole explains that might be a bit provocative is the ineffectiveness of automated room correction equalization such as Audyssey outside of bass frequencies. He makes a very good case to this effect, and I am forced to agree with him. Automated room correction routines are more of a band-aid for flawed loudspeakers rather than an improvement for typical room acoustics. Automated room correction can actually make things worse by attempting to correct for diffraction and acoustical interference effects which change with distance and angle, so in adjusting the frequency response for one position it can mess up the response for many other positions.
Its true usefulness is mostly only in bass frequencies, and even then it can only really help a single listening position unless multi-sub solutions have been involved to reduce seat-to-seat variations. Another subject that Dr. Toole covers at length is the shortcomings of stereo sound compared to multi-channel formats, sound reproduction floyd toole pdf download. Stereo sound recordings can sound great, as so many of us know, but has some severe disadvantages versus 5. In a typical surround sound mix, sound reproduction floyd toole pdf download, in addition to a soundstage with a stable center image regardless of listening position that the sound reproduction floyd toole pdf download speaker provides, the surround speakers can create a greater sense of a different acoustic environment than the room that they are situated in.
The psychoacoustic research that Dr. Toole discusses which explains the superior effects of multi-channel sound with respect to stereo and even quadraphonic sound is a fascinating read.
However, much of the music industry and many audio reproduction equipment manufacturers continue to adhere to two-channel sound despite its psychoacoustic inferiority. It can get somewhat technical at points, but the author does a great job at making complex matters accessible and clear to a general readership.
The book was written to make it readable in pieces based on the subject the reader is interested in, so some points that the author makes are revisited on multiple occasions. However, even those who read it from cover to cover will benefit from this slight repetition, since the book is dense with material, and a subject or point that is explained from multiple angles can be better understood by a non-specialist reader when that subject material is a bit complex.
An accompanying website is under construction. It will contain additional information and simplified guidance about how to apply the scientific findings in real life listening sound reproduction floyd toole pdf download and home theater projects. Those of us who are knee-deep in the audio hobby can spend a great deal of time discussing and debating aspect of sound reproduction, but many of these subjects of discussion and debate are long-settled issues of scientific research.
Furthermore, Dr. Toole makes the complicated subjects of acoustics and psychoacoustics intelligible and interesting through his engaging writing style, no doubt honed over many decades of trying to explain these concepts to non-scientists. This book is not a chore to read like some kind of arcane research paper.
It is easily-digestible and a pleasure to read, and it is made all the more accessible by moments of personal recollection, history, and humor.
Confused about what AV Gear to buy or how to set it up? James Larson is Audioholics' primary loudspeaker and subwoofer reviewer on account of his deep knowledge of loudspeaker functioning and performance and also his overall enthusiasm toward moving the state of audio science forward. Understanding Psychoacoustics The subtitle, "the Acoustics and Psychoacoustics of Loudspeakers and Rooms," touches on the chief components that determine the quality of the sound reproduction.
About the author: James Larson is Audioholics' primary loudspeaker and subwoofer reviewer on account of his deep knowledge of loudspeaker functioning and performance and also his overall enthusiasm toward moving the state of audio science forward. View full profile, sound reproduction floyd toole pdf download.
Read the Complete Thread. Epetti posts on December 15, Fascinating read. Hadn't read any previous editions. His discussion on whether or not acoustic treatment is needed above the transition frequency is interesting.
After immersing myself in learning about room reflections and REW and all he's essentially saying that it's optional but some amount of listening tests suggest people prefer hearing the early reflections for better immersion. So to treat or not to treat. That is the question. Same on auto room equalization above the transition frequency. William Sommerwerck posts on December 13, It's a must-read for anyone selling audio equipment, or serious about organizing their listening space.
It's great because it's science — real science. In looking over sound reproduction floyd toole pdf download 50 years of Floyd Toole's research, it seems that this is probably the only valid research he's done, sound reproduction floyd toole pdf download.
He seems intent on proving that what he already thinks is true is true. It would be unfair to take pot shots at his work however well-aimed when there isn't enough time or space for proper analysis. So I leave you with the following observation. One of the marks of a valid description or theory is that it provokes an AHA! The effect is like the last few turns of a Rubik cube that reveal order out of seeming disorder.
If you don't experience that reaction, then maybe the writer is wrong subtle pun intended. We just haven't asked the right questions. TheWarrior posts on December 12, The first and second editions differ only by publisher. The third is a worthwhile update to have!
Optimize your listening room for the best audio experience! (Room Setup)
, time: 1:22:34Sound reproduction floyd toole pdf download
Explore a preview version of Sound Reproduction right now.. O’Reilly members get unlimited access to live online training experiences, plus books, videos, and digital content from + publishers. A better definition of sound quality would serve as a guide post for those seeking audio nirvana, and I do not think one can find a better explanation of this criterion called ‘sound quality’ than Dr. Floyd E. Toole’s latest book, ‘Sound Reproduction: The Acoustic and Psychoacoustics of Loudspeakers and Rooms, 3rd Edition’. It is more Author: James Larson. Floyd blogger.com, arguably the world's leading authority on loudspeakers, pdf 1. contents Audio Engineering: Science in the Service of Art By Floyd E. Toole Speakers: Reproduction in whole or in part is prohibited without the prior written per.
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