| Are there any good books about audio measurement? [message #69903] |
Wed, 26 October 2011 21:23  |
AdrianG
Messages: 59
Registered: October 2011
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Baron |
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Is there a good book out there about this subject that you would recommend for a beginner? I found one online called An Introduction to Video and Audio Measurement, by Peter Hodges. Based on the description it looks decent, but the focus seems to be more on the video side of things.
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| Re: Are there any good books about audio measurement? [message #69927 is a reply to message #69903] |
Sat, 29 October 2011 16:19  |
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Wayne Parham
Messages: 18789
Registered: January 2001
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Illuminati (33rd Degree) |
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Acoustic measurement is not a casual topic. It may appear to be on first glance, and since measurement gear has become increasingly affordable, lots of people are able to make rudimentary response measurements. I think that's a great thing, certainly helps the DIYer move a step closer to perfection. But it also lulls many people into a false sense of security - or more often into an overexaggerated sense of panic - since just about anyone these days can afford measurement gear, point the microphone and manage to get a chart of some sort. The real trick is knowing where and how to setup and what to do to get meaningful data that is useful.
Still, here are a couple of good books to get you started:
Both these books are somewhat dated, particularly the book by Beranek. There have been new techniques learned since those books were written, largely as a result of the digital age and the ability to easily use new signal types. I wouldn't really say there has been a lot of new discovery though, so the basic concepts they describe still apply.
The most important thing to realize when making measurements is you have to understand the thing you're looking for well enough to know how to test it. There are a lot of issues that can trip you up. You need to understand basic acoustics, or you cannot know what to watch out for. So study acoustics first.
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| Re: Are there any good books about audio measurement? [message #78008 is a reply to message #69927] |
Thu, 03 October 2013 13:06 |
Fannie
Messages: 15
Registered: September 2013
Location: Alabama
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Chancellor |
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| Wayne Parham wrote on Sat, 29 October 2011 16:19 |
Acoustic measurement is not a casual topic. It may appear to be on first glance, and since measurement gear has become increasingly affordable, lots of people are able to make rudimentary response measurements. I think that's a great thing, certainly helps the DIYer move a step closer to perfection. But it also lulls many people into a false sense of security - or more often into an overexaggerated sense of panic - since just about anyone these days can afford measurement gear, point the microphone and manage to get a chart of some sort. The real trick is knowing where and how to setup and what to do to get meaningful data that is useful.
Still, here are a couple of good books to get you started:
Both these books are somewhat dated, particularly the book by Beranek. There have been new techniques learned since those books were written, largely as a result of the digital age and the ability to easily use new signal types. I wouldn't really say there has been a lot of new discovery though, so the basic concepts they describe still apply.
The most important thing to realize when making measurements is you have to understand the thing you're looking for well enough to know how to test it. There are a lot of issues that can trip you up. You need to understand basic acoustics, or you cannot know what to watch out for. So study acoustics first.
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I found a free download of Acoustic Measurements by Leo Beranek. I have not downloaded it yet so I am not sure that it is the complete book.
http://archive.org/details/acousticmeasurem00inbera
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| Re: Are there any good books about audio measurement? [message #82119 is a reply to message #78011] |
Thu, 25 February 2016 19:55 |
HearForYourselfAudio
Messages: 1
Registered: February 2016
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Esquire |
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I agree with the previous comments about both the books and the pitfalls of measuring in a listening room. I find that gated measurements are the best way to eliminate room effects. In my impromptu rig, I actually go outside. I take my speaker and place it on the top of a step ladder. The mic is then set a meter away. A 12 ft (3m) ladder gives you reflection free measurements down to roughly 100Hz. That should be good enough for crossover design purposes. Low frequency performance can be made using a ground plane technique, which can then be spliced with the "gated" data. This technique is outlined in the books mentioned.
Let your ears do the judging... www.hearforyourselfaudioreview.com
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