This page provides an overview of the standard types of mobile inflatable noise barriers from Buitink Technology and their corresponding acoustic performance.

The information is intended for:

• acoustic consultants
• engineering firms
• contractors
• public authorities

Based on this information, in many cases an initial selection can be made of the required type of panel and the expected noise reduction.

👉 Are you seeking customised solutions or project advice? Please also view our customised solutions.

How is noise reduction determined?

Sound insulation of a noise barrier

The effectiveness of a noise barrier is determined by a combination of:

• screen height and positioning
• distance between source and receiver
• sound insulation of the screen itself

This page specifically discusses the sound insulation properties of the inflatable panels.

Measurement method & standards

• Measurements performed:
  The sound insulation of the standard configurations was determined by means of laboratory measurements.
• The measurements were carried out in accordance with:
  NEN-EN-ISO 140-3: Laboratory measurement of airborne sound insulation of building elements.

The measurements

Water and membranes as sound insulation

Sound insulation or water

Acoustic parameters Rw, C and Ctr

The sound insulation of the panels is expressed in:

Rw – weighted airborne sound insulation

C – correction term for mid and high frequencies

Ctr – correction term for low frequencies (traffic, machinery, music)

In many practical situations, the value Rw + Ctr determines the effectiveness of the screen.

Standard types

Buitink Technology has developed and tested a number of standard configurations of inflatable sound panels.
These types form a proven basis for many temporary applications and differ in terms of mass, panel construction and acoustic performance.

In many cases, these standard types can be used to make an initial selection for the desired noise reduction.

Type BUI-V4-200-3

Features:

Weight approx.:	3 kg/m²
Rw (C; Ctr):	20 (-1; -2) dB
Rw + Ctr:	18 dB

Application:

• situations with limited noise requirements
• focus on mid and high frequencies
• very light and compact transport

Type BUI-V4-200-6

Features:

Weight approx.:	6 kg/m²
Rw (C; Ctr):	26 (-1; -3) dB
Rw + Ctr:	23 dB

Application:

• temporary construction situations
• logistics applications
• limited low-frequency component

Type BUI-V6-200-7

Features:

Weight approx.:	7 kg/m²
Rw (C; Ctr):	30 (-1; -4) dB
Rw + Ctr:	26 dB

Application:

• construction sites
• railway works
• combination of mobility and performance

Type BUI-V6-200-11

Features:

Weight approx.:	11 kg/m²
Rw (C; Ctr):	33 (-1; -5) dB
Rw + Ctr:	28 dB

Application:

• higher requirements for low-frequency reduction
• temporary installations and machinery

Type BUI-V6-200-35

Features:

Weight approx.:	35 kg/m²
Rw (C; Ctr):	39 (-1; -3) dB
Rw + Ctr:	36 dB

Application:

• heavy construction machinery
• industrial applications
• situations with dominant low frequencies

Type BUI-V6-200-70

Features:

Weight approx.:	70 kg/m²
Rw (C; Ctr):	52 (-3; -8) dB
Rw + Ctr:	44 dB

Application:

• very strict noise standards
• festivals
• urban situations with nearby residences

Summary & referral

The correct choice of panel type depends on the project and is determined by:

• the sound spectrum of the source
• the desired noise reduction
• the available space
• the screen height and positioning

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