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HOME >> NEWS >> Perforated Sound Absorbing Panel for Stairwell Sound Echo

Perforated Sound Absorbing Panel for Stairwell Sound Echo

Stairwells are natural echo chambers, causing sound to travel vertically across floors. Installing perforated sound absorbing panels with mineral wool backing reduces reverberation time, speech reflection, and footstep noise. This article explains panel materials, perforation design, case studies, and compliance with ISO and ASTM acoustic/fire standards. It also showcases a real-world retrofit where RT60 was cut from 2.4 s to 0.9 s using 18 mm MDF panels in a Berlin commercial tower.

Perforated Sound Absorbing Panel for Stairwell Sound Echo

Introduction

Stairwells are notorious for excessive echo and reverberation due to their hard surfaces and vertical geometry. This makes communication difficult and causes discomfort in residential, commercial, and institutional buildings. Installing perforated sound absorbing panels along stairwell walls and ceilings is a proven solution to reduce echo, improve speech clarity, and enhance safety and acoustic privacy.

Why Stairwells Need Acoustic Treatment

  • Vertical Echo Chamber: Stairwells act as resonant tubes amplifying mid- and high-frequency sounds.

  • Safety & Accessibility: Poor acoustics hinder emergency instructions and auditory awareness.

  • Noise Transfer: Sound easily travels from one floor to another through untreated stairwells.

Panel Design for Staircore Applications

  • Material: Perforated MDF or plywood, fire-retardant treated, with micro-perforations (3–6 mm).

  • Installation Height: Panels should extend from floor to ceiling or be placed at reflection points.

  • Backing Cavity: 40–75 mm filled with mineral wool or acoustic foam to absorb speech frequencies.

  • Perforation Ratio: 7%–12% provides effective reverberation control across wide bandwidths.

  • Surface Coating: Durable, anti-scratch UV finish suitable for high-traffic public areas.

Standards & Studies

Case Study: Stairwell Retrofit in Commercial Tower (Berlin)

A 12-floor commercial stairwell had significant echo problems. Designers installed fire-rated MDF panels (18 mm thick) with a 9 mm perforation and 60 mm rockwool backing. Post-installation tests showed reverberation time dropped from 2.4 s to 0.9 s. Footfall noise and voice transfer between floors were also significantly reduced.

Integration Tips

  • Use full-height vertical slats for safety and performance.

  • Apply corner panels to eliminate sound concentration zones.

  • Match wood veneer to surrounding finishes for aesthetic consistency.

Contact for Stairwell Panel Design

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