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Bass Trap Fillers, Acoustic filling for bass traps

What is a Bass Trap?
Bass Traps, also referred to as corner absorbers or acoustics baffles, are sound-absorbing objects, often made of plywood for instance, and high in volume. The volume, or size, of a Bass Trap is determined by frequencies that need to be neutralised. How lower the frequency, the deeper a bass trap needs to be. In most situations Bass Traps will be placed in the corners of a room, so a  triangle shape is most efficient to the space. Bass Traps should be filled for at least 80% with an acoustic material with a certain density to absorb low frequencies.

When and where and to use Bass Traps?
A simplified explanation: your studio or hifi listening room needs Bass Trapping when low frequencies dominate other frequencies. Some bass is needed of course, but when low tones in music wipe away mid tones or even treble you can be sure you need Bass Traps. What is happening is that low frequencies, standing waves, fit exactly in the room, as it were. These waves produce so much energy which results in booming basses, no matter what you do.

With enough Bass traps, of the right size, in the corners of a room these waves become 'shorter' so to say. By filling at least two corners with Bass Traps you change the shape and volume of the room and thereby neutralise the standing waves. The most common places for Bass Traps are the corners in front and behind the listening position. If the Bass Traps are large enough this should give a excellent results. A Bass Trap with a depth of 50 cm can absorb or change a frequencies of about 200 Hz (1/4 sound wave). This is about the lowest that acoustic panels can absorb. If you have acoustics panels and still have problems with low tones and basses your Bass Trap should be deeper, depending on the frequencies.

Bass Traps filling materials
If you are making your own Bass Traps you need an acoustic wool product as a filling. We have great alternatives for glass wool and mineral wool materials. Products such as Akotherm Basic polyester wool and Acoustic Cotton Wool are great to use as a Bass Trap filling. Also great materials to use as a filling for DIY acoustic panels.

Products for Bass trap filling, sound absorbers

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  1. Firm Polyester Wool Acoustic Panel.
    Akotherm Basic D40
    Basic Room Acoustics Panel
    • High density polyester wool panel
    • Sound-absorbing acoustic panel
    • Excellent acoustic properties

    Starting at £16.86

    (incl. vat)
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Acoustics, soundproofing, insulation and ventilation for Home Studio, Cinema & Hifi rooms
Acousticshop offers solutions and products for room acoustics, soundproof and ventilate a home studio, home cinema and hifi rooms. Take a look at our Acoustic Panels page for room acoustics, soundproofing for walls, ceiling and floors, and Silent ventilation page to silently ventilate your recording studio, home cinema or hifi listening room. If you need advice about rooms acoustics or soundproofing, just let us know, we are happy to help!


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