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HOME >> NEWS >> Reducing Vertical Echo in Stairwells with Perforated Acoustic Panels

Reducing Vertical Echo in Stairwells with Perforated Acoustic Panels

Stairwells in tall buildings often amplify footsteps, voices, and mechanical noise. Installing perforated acoustic panels along walls, soffits, or landings significantly reduces vertical echo, improves speech intelligibility, and prevents sound transmission between floors. This guide covers material selection, mounting strategies, fire-rated compliance, and real-world case studies—such as a Toronto hospital stair core retrofit achieving a 65% reverb time reduction using 18 mm perforated MDF with 50 mm acoustic backing.

Reducing Vertical Echo in Stairwells with Perforated Acoustic Panels

Problem Overview

In multistory buildings, stairwells often act as vertical sound tunnels. Footsteps, conversations, and mechanical noise bounce between levels, creating a disruptive echo chamber. Perforated acoustic panels installed on stairwell walls, soffits, or landings can drastically improve sound absorption, reduce vertical echo, and ensure quieter circulation zones.

Key Benefits of Acoustic Stairwell Treatment

  • Noise Isolation Between Floors: Prevents voices and noises from transferring through stair cores.

  • Improved Speech Intelligibility: Emergency announcements or instructions become clearer in stair shafts.

  • Enhanced Building Acoustics: Controls reflections in open atriums or stair towers adjacent to common areas.

Recommended Panel Specifications

  • Material: Perforated HDF, laminated wood, or FR-rated MDF.

  • Perforation Design: Hole diameters between 4–10 mm, with linear or staggered spacing for aesthetic integration.

  • Backing Options: Install with 60 mm glass wool or polyester acoustic core for broadband absorption.

  • Mounting: Use vertical sub-framing systems with concealed fasteners for stability and clean lines.

  • Compliance: Ensure panels meet UL 723 or ASTM E84 fire standards for stairway egress routes.

Performance & Testing

  • MDPI Research: Echo time in stairwells reduced from 2.2 s to 0.85 s using 20 mm acoustic panels.

  • ISO 354: Methodology for measuring reverberation time.

  • ResearchGate Study: Evaluated noise reduction between stairwell and adjacent office corridors.

Project Highlight: Hospital Stair Core in Toronto

A healthcare facility with a six-story stairwell retrofitted its core with 18 mm perforated panels featuring a 50 mm acoustic mineral backing. Post-upgrade results showed a 65% decrease in reverberation time and improved acoustic comfort for both staff and patients using the stairwells for movement or emergencies.

Integration Considerations

  • Use anti-graffiti coating or high-durability veneer for public settings.

  • Consider matching panel tones to railing or wall paint for seamless design.

  • Include ceiling-mounted perforated baffles in tall vertical shafts.

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