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Acoustic treatment alternatives
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<blockquote data-quote="Brad Weber" data-source="post: 40706" data-attributes="member: 114"><p>Re: Acoustic treatment alternatives</p><p></p><p></p><p><a href="http://www.churchproduction.com/go.php/news/15929#" target="_blank">http://www.churchproduction.com/go.php/news/15929#</a></p><p></p><p>There was also a church here that added a lot of very thick absorption to address some acoustical problems. Talking to the people involved, that led to several discoveries including that even thick absorption has a practical low frequency cutoff and that too much mid band absorption can make a room aurally uncomfortable. So after spending big bucks on the acoustical treatment they ended up having to spend even bigger dollars for an electronic acoustic enhancement systems.</p><p></p><p>In both of these cases, an overly 'dead' room led to quite large expenditures. Not necessarily relevant in your case but this is why it is so important to get someone to look at acoustics early in a facility design as trying to address acoustics as an integral part of the room design is often much more cost effective than trying to address them after the room is already designed.</p><p></p><p></p><p>Cost depends greatly on how detailed their analysis and recommendations get, how challenging the space is and whether they perform site measurements before and possibly after the treatments are installed. I will say that most consultants are likely to be somewhat wary of DIY treatments as there is no laboratory derived acoustical performance for the overall assembly. They may be able to calculate or estimate the performance and the results may be very close, but there is always the spectre that you are then calculating something based on another calculation or estimate that you hope is accurate. An example of the risk is basing an analysis on panels made of fiberglass board with no backing that are then furred off the wall to benefit on low frequency absorption only to have the person constructing the panels make them with a solid plywood back.</p><p></p><p>There are a good number of qualified firms in California, but I don't know that area that well so I'm not sure which may be close to you. </p><p></p><p></p><p>The room shape. volume, etc. were likely factors but so is the use. An acoustically 'dead' room may be acceptable or even desirable for rock shows and many theatrical productions but not for symphonic, orchestral or choral music or for audience/congregational response and interaction or for organ music. The challenge with many space, including many churches, is that they are not necessarily dedicated purpose in this regards, they often have to support a range of uses and musical styles thus they need to achieve an appropriate balance or flexibility for the acoustical environment.</p></blockquote><p></p>
[QUOTE="Brad Weber, post: 40706, member: 114"] Re: Acoustic treatment alternatives [url]http://www.churchproduction.com/go.php/news/15929#[/url] There was also a church here that added a lot of very thick absorption to address some acoustical problems. Talking to the people involved, that led to several discoveries including that even thick absorption has a practical low frequency cutoff and that too much mid band absorption can make a room aurally uncomfortable. So after spending big bucks on the acoustical treatment they ended up having to spend even bigger dollars for an electronic acoustic enhancement systems. In both of these cases, an overly 'dead' room led to quite large expenditures. Not necessarily relevant in your case but this is why it is so important to get someone to look at acoustics early in a facility design as trying to address acoustics as an integral part of the room design is often much more cost effective than trying to address them after the room is already designed. Cost depends greatly on how detailed their analysis and recommendations get, how challenging the space is and whether they perform site measurements before and possibly after the treatments are installed. I will say that most consultants are likely to be somewhat wary of DIY treatments as there is no laboratory derived acoustical performance for the overall assembly. They may be able to calculate or estimate the performance and the results may be very close, but there is always the spectre that you are then calculating something based on another calculation or estimate that you hope is accurate. An example of the risk is basing an analysis on panels made of fiberglass board with no backing that are then furred off the wall to benefit on low frequency absorption only to have the person constructing the panels make them with a solid plywood back. There are a good number of qualified firms in California, but I don't know that area that well so I'm not sure which may be close to you. The room shape. volume, etc. were likely factors but so is the use. An acoustically 'dead' room may be acceptable or even desirable for rock shows and many theatrical productions but not for symphonic, orchestral or choral music or for audience/congregational response and interaction or for organ music. The challenge with many space, including many churches, is that they are not necessarily dedicated purpose in this regards, they often have to support a range of uses and musical styles thus they need to achieve an appropriate balance or flexibility for the acoustical environment. [/QUOTE]
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