aQtube

A temporarily installed inflatable acoustic sound absorber system
f [Hz]
125
250
500
1k
2k
4k
α ON
0,35
0,45
0,45
0,30
0,20
0,15
α OFF
0,00
0,00
0,00
0,05
0,05
0,10

INTRODUCTION

The patented aQtubes™ are temporarily installed inflatable sound absorbers. Importantly, they (also) absorb low frequencies, reducing the well-known rumbling sound encountered at most amplified indoor concerts in concert halls as well as arenas and stadiums. This rumble is the most frequent reason for poor-sounding concerts. In this sense, the product is a game-changer in the live music industry.

When installed permanently in arenas, aQtubes™ can be adjusted to provide optimal sound for sports (off) and concerts (on).

HOW IT WORKS

Traditionally, curtains/drapes are used to improve the acoustics temporarily. But these work poorly at the crucial low frequencies while over-damping the highs.

This is where aQtube makes a natural - and very audible - difference, absorbing bass and mid-frequency reverberant sound for a clean, defined-sounding concert.

Further, when packed in flightcases, they take up almost no space, as it is simply air that enables the absorption!

Finally, they are CE-certified and pass fire- and safety requirements worldwide.

CASE STUDIES

aQtube has been in use many times at large events, and in some of the cases, we got the chance to make measurements before and after aQtubes were mounted:

ABSORPTION WHERE IT MATTERS MOST

The aQtube has an absorption coefficient of approx. 0,5  (63-1k Hz) in the densest configuration when mounted directly on the ceiling. This alpha works in the entire ceiling area. When inactive, it is close to zero.

TECHNICAL SPECS

Technical
specifications

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f [Hz]
125
250
500
1k
2k
4k
α max / ON
0,8
0,8
0,8
0,6
0,5
0,3
α max / ON
0,1
0,05
73
31
0,05
0,05
α max / OFF
0,1
0,05
73
31
0,05
0,05