When it comes to audio quality, where every upgrade seems to involve understanding the nuances of connector types and advanced format standards, it's surprising to find a piece of hardware that can improve your system but doesn't even need to be plugged in. But acoustic panels really can make a big difference.
Acoustic panels improve the sound quality of your existing speakers by reducing the amount of sound waves reflected off the walls. They can be extremely effective with even a few panels, as long as they're placed correctly.
If you're building a home theater, doing any kind of audio recording of music (or maybe for a podcast), or if you're simply trying to figure out if there's an option to address a noisy office environment, acoustic panels are the right tool for the job.
If you've ever heard the difference between cheap speakers and even a modestly priced soundbar or surround sound speaker system, you know how much of an impact some proper speakers can have. It's one of the best investments you can make in your audio setup (especially if you're treating a space with a home theater). But there is one unintended consequence of adding more speakers: you now have more soundwaves to deal with.
Especially if you've sprung for a system that has lots of speakers pointed in different directions, you're going to have a lot of sound waves flowing through the air than you ever have before. The only problem is that when sound waves cross other sound waves in the air, it affects those waves, shifting and changing them.
We have another article detailing all the ins and outs of acoustic panels, how they work, and everything else you need to know, but for now here are the basics: Acoustic panels are made of foam that traps the sound waves that hit them. They usually have a fabric covering to make them more aesthetically pleasing, although you might see some bare panels in places like recording studios where cosmetics aren't as important.
Acoustic panels are made of materials like dense foam, wool, or acoustically useful insulation materials like fiberglass or denim, that allow sound inside, but not out. And if you have seen bare foam panels before you'll notice that some of them have jagged triangular shapes cut into the top.
These geometric shapes act as a sort of funnel for the sound waves, which bounce back and forth down them until they're channeled into the foam itself. When you have acoustic panels placed strategically around your space, the panels act to absorb the sound waves in the air after they've already been heard by you, but before they have a chance to bounce off the walls.
This is important because when the sound waves aren't controlled, they bounce all over the place, crashing into other waves as described above.
Acoustic panels are very effective at managing sound waves for you. They eliminate that reflected, unwanted sound automatically. But there are a few details you have to get right to get the most out of acoustic panels.
First, you have to get panels of sufficient thickness to trap all of the sounds. Note these two examples: the ATS Acoustic Panel consists of panels that are 2 feet across, 4 feet high, and 2 inches deep. But another option, the ADW Acoustic Panels consists of several panels of varying size that are only 1 inch deep.
Ignoring the fact that they are different rectangular sizes (so they have different surface areas) you can note that the difference in thickness is extreme. The ADW panels won't have nearly as good of an effect with their 1 inch thickness. We recommend using panels that are at least 2 inches thick to get the most bang for your buck.
Next, you're going to need to get enough acoustic panels to make a difference. Unfortunately, you don't just need one, and you probably don't just need three or four. We have a separate article on how many panels you need for different purposes, but the basics are:
To do it right, you'll need at least one acoustic panel per speaker, and maybe more. A good rule of thumb is to shoot for coverage of at least 20% of your open wall space. But if you can start with fewer, so long as you put them in the right spots. And for studio-quality sound absorption, you should be thinking in larger numbers like 50-100% coverage, depending on the quality you need.
It's clear that acoustic panels can be very effective at controlling sound waves in your space. They can get you the most bang for your buck from that advanced stereo speaker system, or make sure that you're music and audio recordings are crystal clear. But there are a few details you have to get right.
You need to make sure the acoustic panels you get are thick enough, and that you use enough of them to cover all the right spots to match your setup. And going from there, you may need to add a few more to really make sure the acoustics of your space are controlled. More doesn't always mean better, but with acoustic panels, it usually does.
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