Archives February 2010

Flanking and walls

Flanking in your walls

The consequences of architectural design. What a concept!

Designing for confidential privacy is the same thing as designing so your neighbor isn’t experiencing your music!

Knowing where you are in speech levels gives you an idea of what you are going to have to do to get your frequency levels down to an acceptable level. If you can hear the neighbors, the neighbors can hear you!

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STC what is it?

STC = Sound Transmission Class

This single number rating applies to the frequency range from 125Hz to 4kHz. A higher STC rating is desired especially for keeping your sound inside and the neighbors noise, outside!

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Doors and window framing

Doors openings and window framing

Often a place of question in a home theater or recording studio is the doorways and window framed areas. It proves to be simple but requires some information from the builder to do it right the first time.

This video gives a quick and easy demonstration that covers everything you need to know for cutting framing material and installation of an opening.

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Building a straight wall

Construct a straight flat wooden framed wall

Building a straight wall is critical

 Maybe you have never even considered this.

All the different species of lumber is grown and milled so quickly in this Century that the tendency to bow, twist and warp is high. Fact is, depending on the quality of the lumber from “kind of warped” to the “super straight” framing material you pay accordingly.

In addition another thing that is the biggest reason lumber will warp, bow and twist…the weather. Wood laying in direct sunlight will begin to loose moisture and the ability to build a straight wall decreases as the material warps and bows and twists. Rain can be just as bad in that it makes the wood a bit more difficult to handle. But if left in the sun, it too will soon take a different shape. For this reason and this reason alone, sun and rain and all that weather brings, protect it by covering with a substantial water proof plastic.

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French Cleat

French Cleat Applications for hanging treatments

French Cleat: Hanging heavy pictures panels and objects securely.

The French cleat is a common and useful builders method for hanging items on to walls. It is more secure and level then a nail in the wall or even picture hanging devices.

As a means to hang wall panels of absorbent materials this french cleat is your ticket to a stable and level hanging panel.

A French Cleat hanging or support solution can be developed in four simple steps.

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Acoustic isolation / sound proofing

Soundproofing a home recording studio

Soundproofing on “Holmes on Homes”

This is a good example of what is called “isolation” and how to do it. Isolation is often confused with acoustical treatments. This has always been incorrect.

The sponsor is Quietrock(r) so thier product is used in this video. For your home theater or studio, standard sheetrock can be used with very good results.


Look closely as this video plays. After the sheetrock has been removed from the wall you can clearly see two(2) different stud framing sides to this wall. This is a simple “decoupling” technique that will give you a better rated wall then a simple one row stud framed wall.

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Sound proof window plug

How to build a window plug and stop sound leaks

This is a good fit as to the importance of doors and windows.

After all is said and done, windows and doors are part of the vertical few that are the biggest sound leak areas your recording and home theater construction will suffer at.

What the video presents is good general purpose information as it relates to sealing up windows and doors to prevent sound or air leakage. It at least gets the builders mind on the idea! And this is an important mind set to develop. It shouldn’t be thought of along the way, it should be ever-present.

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Acoustic broad band panel

Acoustic broad band panel: How to make yours right

How to make a broad band acoustic panel is a much covered area of the recording environment build process.

One of the best places to get accurate information on how to make broad band acoustic panels is

You may have special requirements that a general type broad band absorption panel may not cover, to that I offer this linked page of many types and designs of wall mounted broad band acoustic panels to better meet your needs.

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Building the Home recording studio

Building the Home recording studio – Jeff Cooper

Get it done and get it right!

Great introduction to the complexities involved in the audio recording environment. Mr. Cooper has a very easy way of making the difficult read easy. A lot of information is packed into this fine manual, enough to satisfy an introductory or beginner level home recording studio builders needs.


Many areas are deep enough to be satisfying when building a home recording studio. Sketched pictures are included that are helpful but go into no depth for the reader to achieve some of the construction designs. To his credit, Mr. Cooper does read his email messages and did get back to me on a question that I had. Plus one!

It is a well written and valuable book that should be part of any builder who is thinking about or has already been through the process of building the home studio or a home theater as well.

If you are well versed in construction and have an above average grasp on isolation techniques and treatments involved in taming standing waves, flutter and room interference, you may not need this information. Could be that just reading every article on will have been enough for you.

If you are starting out gathering information to develop a quality recording studio, then you should start with Jeff Coopers’ book, “Building the Home Recording Studio“.