To reduce unwanted noise, first decide which sounds are causing difficulty and when. A service-time review can distinguish music level, room reflections, voices and equipment so that the operator can prioritise suitable changes.
Understanding the Source of the Problem
Restaurant noise does not come primarily from the sound system. It comes from the accumulation of ambient energy in the room: conversation, cutlery, plates, movement, mechanical systems, and the feedback loop that occurs when guests raise their voices to compete with that ambient level.
The acoustic character of the room determines how quickly that energy accumulates and how long it persists. A room with high reverberation time, meaning sound takes a long time to decay after it is generated, will become significantly louder as it fills. A room with well-controlled reverberation absorbs energy faster, keeping the ambient level more stable even at full occupancy.
The single most effective way to reduce noise in a restaurant is to control reverberation time through the specification of absorptive materials and surfaces. Everything else is secondary.
Materials That Absorb Sound
Absorption is determined by the porosity and density of a surface. Materials that perform well acoustically include fabric upholstery on seating and booth partitions, heavy curtains or drapes, carpet and textile floor coverings in appropriate zones, perforated ceiling panels with absorptive backing, timber slat systems with acoustic insulation behind them, and bespoke joinery details that incorporate fabric or felt finishes.
Materials that reflect sound and contribute to noise accumulation include polished concrete, glazing and mirror, stone and ceramic tile, plaster and painted masonry, and exposed metal. These are also the materials that define the contemporary hospitality interior. The challenge is not to eliminate them but to balance them with sufficient absorptive surface area to control the acoustic result.
A common failure mode is specifying a single acoustic intervention, such as a suspended baffle or a panel wall, that is insufficient in area to meaningfully affect a room of significant volume. Absorption must be distributed across enough of the surface area to change the acoustic character. A few panels in a room with 200 square metres of hard surface will not achieve that.
Review ceiling options within the whole room
A ceiling may provide useful treatment opportunities, but its effectiveness is not automatically greater per square metre than a wall treatment. Assess the proposed construction and mounting, room geometry and source positions. Coordinate any intervention with the existing services, access and operating constraints.
Source: FIS (2021), Ceilings and Acoustic Absorbers, hosted by Rockfon
One system. Several functions.
Illustrative venueAt concept design the venue is a plan: walls, openings and furniture. This is the point to design the audio, while ceilings, joinery and services can still move.
- Stage
- RIBA Stage 2
- Drawings
- Plan and furniture layout
The installed system: loudspeakers, integrated subwoofers and acoustic treatment, coordinated with the architecture. Every operating state that follows runs on this same equipment.
- Sources
- Playlist and DJ
- Routing
- Either source to any room
Music sets the character of the room without leading it. Even coverage and consistent level matter more than output.
- Source
- Scheduled playlist
- Preset
- Background
- Control
- Automatic
A private room separates for a dinner, launch or speech, then returns to service, without the team needing to touch the technical system.
- Source
- Playlist, private room independent
- Preset
- Event
- Control
- Private room panel
Where the brief calls for it, playback hands over to a DJ or live performer, with inputs, routing, monitoring and low-frequency support already designed in.
- Source
- DJ input, playlist off
- Preset
- Performance
- Control
- DJ or performer
Source
Active
Available, inactive
Speakers
Wall-mounted speaker
Integrated subwoofer
Bass trap
Coverage
Lower energyHigher energy
Layout and Furniture as Acoustic Tools
Furniture placement and booth configuration contribute meaningfully to acoustic performance. High booth partitions between tables act as diffusers and partial barriers, reducing the direct transmission of conversation between seating areas. Dense planting used as zone dividers performs similarly. The positioning of a bar or service station can either concentrate or distribute noise energy depending on how it relates to the room geometry.
These are not substitutes for material level acoustic treatment. They are supplementary tools that, when considered alongside material specification and ceiling design, contribute to a more controlled result.
What can change in a trading venue
Existing finishes and infrastructure can constrain the options, but they do not establish a universal retrofit penalty or failure. Prioritise interventions by the diagnosed problem and the disruption they require. Avoid declaring all measures secondary to reverberation control, or treating planting and high booths as equivalent proven treatment.
Source: Siebein and Siebein (2023), Restaurant Acoustics: A soundscape exploration and case studies
