Planning security for the catering industry – noise protection as a means of securing livelihoods

Phase 01: The Problem

The challenge: Lost revenue due to emissions control

Restaurants, bars and clubs in densely populated urban areas face a dilemma: operating in outdoor areas, courtyards or on terraces is often only possible under extreme conditions.

  1. Early closing times:Authorities often order the closure of outdoor areas from 10:00 PM onwards if the noise reflections off the facades exceed the limits for residents.
  2. Acoustic amplification:In narrow courtyards or alleyways, the architecture acts like a resonating chamber. A conversation between guests is reflected multiple times by hard facades and perceived as twice as loud by the neighbor.
  3. Economic risk:Every hour that an outdoor area has to close earlier means a direct loss of revenue, especially during the lucrative summer season.

The analysis: The problem of conventional insulation

To reduce noise levels, reflective surfaces (walls, ceilings in passageways) must be designed to be sound-absorbing. However, conventional materials (foams, mineral wool) are often unsuitable for this purpose.

  • Weather:Outdoors, they absorb water, weather quickly and lose their acoustic effect.
  • Fire protection:Restaurants and other food service establishments are subject to the strictest fire safety regulations. Flammable absorbers on facades or in passageways are often not approved by building authorities.
Phase 02: The Solution

The solution: Absora HSA3 as a "curfew savior"

By installingmetallic, microperforated absorbers (HSA3)At strategic reflection points, ambient noise is significantly reduced.

  • Longer management period:Reducing the noise level at the facade allows compliance with the noise limits set by the TA Lärm (Technical Instructions on Noise Protection). This often enables longer opening hours for outdoor areas, thus securing evening sales.
  • Fire protection without compromise (A1):As a purely metallic solution, HSA3 meets the highest fire protection class. This is crucial for approval processes in densely built-up city centers and assembly venues.
  • Weatherproof & Durable:Aluminum is corrosion-resistant and does not absorb moisture. Its acoustic performance remains constant for decades, regardless of rain, snow, or heat.
  • Aesthetics & Hygiene:The material looks modern and high-quality. It is easy to clean and blends seamlessly into modern restaurant concepts.
Phase 03: The Impact

Restaurateurs gain valuable time with HSA3. Investing in metallic soundproofing protects good relations with the neighbors and ensures the legal basis for operating late into the night.

"Anyone who wants to operate outdoor dining in the city has to control the noise. HSA3 transforms reflective 'noise walls' into absorbing quiet zones – thus protecting the concession and the revenue."

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