Fire-certified for public buildings EN 13501 B-s1,d0 Made-to-measure printing in your colours Delivery 10 to 15 days · DDP Europe
07 50 73 47 86 Free quote

Guillaume Schlupp

Founder of ACOUSTELIO

I design made-to-measure printed acoustic panels for professional spaces, and I write here to make room acoustics clear and actionable, without needless technical jargon.

My LinkedIn profile ↗

My background

Why I got into acoustics.

I am an entrepreneur in e-commerce and made-to-measure product manufacturing. Working day after day with restaurant owners, offices and hoteliers, one thing kept coming back: beautiful spaces, unbearable the moment they fill up. Noise ruins the experience, wears teams out and drives customers away. And most of the solutions on the market are either ineffective or frankly ugly.

I created ACOUSTELIO to reconcile the two: genuine acoustic performance and an object people actually want to show off. I work directly with manufacturers, I select materials whose performance is measured (absorption NRC 0.85) and whose fire rating is documented (EN 13501-1 B-s1,d0), and I insist on one thing: an honest, costed quote that aims at a precise acoustic target rather than selling as many panels as possible.

This blog is the extension of that approach. I explain here what I come to understand about the subject project after project: the difference between correction and insulation, how to estimate the right quantity of panels, what certifications are really worth. The idea is not to play the expert who knows everything, but to share reliable benchmarks so you can decide with a clear head.

My topics

What I write about.

Room acoustics

Reverberation, speech intelligibility, reverberation time: understanding what makes a space noisy and how to calm it down.

Sizing it right

How many panels, where to place them, how much surface to treat: the method rather than ready-made recipes.

Standards & materials

Public-building fire rating, NRC coefficient, recycled PET felt: what the certifications actually mean.

His articles

The guides I have written.

3 July 2026

How to Reduce Reverberation: A Practical Guide to a Room Where You Can Hear Each Other Again

Why your room echoes and how to reduce reverberation: surfaces to treat, wall panels, ceiling baffles, mistakes to avoid. A field-tested guide.

Read the article →

2 July 2026

Acoustic Treatment vs Soundproofing: The Real Difference Explained

Acoustic treatment or soundproofing? Definitions, αw and NRC coefficients, real cases in restaurants, offices and public buildings to pick the right fix.

Read the article →

1 July 2026

Sound Absorption Coefficient: Definition, Measurement and Materials Chart

Definition of the sound absorption coefficient (αs, αw, NRC), ISO 354 measurement, classes A to E and a full materials chart, from concrete to PET felt.

Read the article →

30 June 2026

Reverberation Time: Definition, Calculation and Target Values by Space

Reverberation time (RT60) measures how long sound persists in a space. Sabine formula, measurement, target values by space and an action plan.

Read the article →

29 June 2026

How to mount an acoustic panel: adhesive, clips, rails and ceiling hanging

Adhesive, clips, rails or cables: how to mount an acoustic panel on drywall, concrete, brick or the ceiling. Method by surface, tools and mistakes to avoid.

Read the article →

28 June 2026

Noisy restaurant: why your dining room maxes out and how to truly calm it

Why your restaurant is too loud and how to fix it: the Lombard effect, sound levels in dB, solutions ranked by effectiveness, real-world budgets.

Read the article →

27 June 2026

Open plan office noise: the real impact and the solutions that work

Open plan office noise: INRS and Ifop figures, NF S31-080 targets by activity and ranked solutions to restore focus and productivity.

Read the article →

26 June 2026

EN 13501-1 standard: the guide to decoding euroclasses and fire classification

EN 13501-1 standard: euroclasses A1 to F, smoke s1 to s3, droplets d0 to d2, M0 to M4 equivalences and public-building requirements. The guide to reading a fire test report.

Read the article →

25 June 2026

Acoustic felt: the complete guide to recycled PET material

What is PET acoustic felt? Manufacturing, NRC absorption, comparison with foam, rock wool and wood, limits and maintenance: the complete guide.

Read the article →

24 June 2026

How many acoustic panels do you really need for your room?

How many acoustic panels for your room? The 15-30% rule, the Sabine formula and 3 worked examples to size it right, without over-covering.

Read the article →

An acoustic project to cost?

Send me your floor plan or a few photos, and I get back to you with a quote within 48 h.

Request my free quote