Lucas Keizer
Lucas Keizer is the founder of KGI Groep (Kenniscentrum Geluidsisolatie) and has worked as an independent acoustic consultant since 1994. He has overseen more than 2,500 projects and is the author of NHR-ACOUSTICS-01:2026, the international guideline for acoustic comfort in hotels.
Expertise
- Acoustics
- Sound insulation
- Noise measurements
- NEN 5077
- NEN-EN-ISO 16283
- NEN 1070
- NEN-EN-ISO 12354
- Building acoustics
- Hotel acoustics
Clients
Carries out independent expert investigations in noise disputes, commissioned by legal expenses insurers. He also conducts acoustic research for municipalities, environmental agencies and housing associations across the Benelux.
Publications and media
External publications and guidelines that cite Lucas Keizer's expertise or that he authored.
- In the mediaTrouw · 2026
Zelfs op fluisterniveau maakt de warmtepomp van Julia nog net te veel lawaai
Cited on heat-pump noise and the statutory 40 dB limit at neighbouring dwellings.
Read the article - In the mediaMisset Horeca · 2026
Geluidsnormen in de horeca: hoe ondernemers boetes voorkomen
Featured as acoustic expert on noise regulations in hospitality and how operators avoid fines.
Read the article - In the mediaBouwwereld · 2026
5 uitvoeringsfouten die de akoestische prestatie van woningen fors verslechteren
Featured as acoustic expert on the five construction errors that damage the sound insulation of homes most in practice, illustrated with material from our own inspections.
Read the article - In the mediaBrabants Dagblad · 2026
Stervensdruk met geluidsadvies aan horeca: ‘Terrasgeluid is lastig, maar er is een manier’
Featured as an independent expert in noise disputes on terrace noise in hospitality: why guest behaviour is not part of a noise calculation and what an operator can actually do.
Read the article - In the mediaKinderopvangTotaal · 2026
Moe door slechte akoestiek op de groep: ‘Dit moet prioriteit krijgen’
Featured as acoustic consultant on noise in childcare: why poor acoustics in the group room tire both children and staff, and how to create a less stimulating environment.
Read the article - In the mediaListenIN · 2026
Waarom een warmtepomp die aan de norm voldoet toch geluidshinder kan veroorzaken
Featured as acoustic consultant on heat pumps that stay within the limit yet still cause nuisance, with a case from practice and the measures that work: vibration dampers, an enclosure or a different spot for the outdoor unit.
Read the article - AuthorKGI Groep · 2026
NHR-ACOUSTICS-01:2026, richtlijn voor akoestisch comfort in hotels
Author of the international guideline for acoustic comfort in hotels (class A and B).
View the publication - AuthorVastgoed Journaal · 2026
Akoestiek als blinde vlek in de vastgoed businesscase
Guest contribution on acoustics as an underestimated factor in the real-estate business case, with insights from thirty years of acoustic research.
Read the article - AuthorAdvocatie · 2026
Geluidsoverlast bewijzen: waarom een NEN 5077 meting het verschil maakt bij de rechter
Professional contribution on how an independent NEN 5077 measurement turns subjective noise complaints into objective evidence that courts accept.
Read the article - AuthorMr. Online · 2026
Twee groeiende categorieën geluidsgeschillen: warmtepompen en contactgeluid bij zwevende vloeren
Guest contribution in the legal trade journal Mr. Online on the two fastest-growing categories of noise disputes (heat pumps and impact noise from floating floors) and the role of objective measurements in establishing evidence.
Read the article - AuthorDoof.nl · 2026
Warmtepompen en laagfrequent geluid: de bromtoon die je niet kunt negeren
Contribution on low-frequency noise from heat pumps: why a standard dB(A) measurement fails to capture the hum, and what steps affected residents can take.
Read the article - AuthorVVP Special Partnerships · 2026
De sluipende claimcategorie
Contribution for financial advisers on noise disputes as a growing claims category in legal expenses insurance (heat pumps, hard floors and disputes within owners' associations), and why advisers should tell clients that a noise measurement may be covered.
Read the article - AuthorGawalo · 2026
Geluidsnorm warmtepomp: '40 dB(A) geldt dag en nacht'
Contribution for installers on the noise limit for heat pumps: why 40 dB(A) at the property boundary applies day and night, and why the tonal penalty is so often overlooked.
Read the article - AuthorGawalo · 2026
Geluid warmtepomp: 3 meest voorkomende fouten bij plaatsing buitenunit
Contribution for installers on the three placement errors with outdoor units that most often lead to noise complaints, and how installers avoid liability.
Read the article - AuthorIamExpat · 2026
Noisy neighbours in the Netherlands? Here are your rights as a tenant
Article for international tenants in the Netherlands: which noise limits are enforceable, how to document a complaint, what a measurement delivers and how to claim a rent reduction through the Huurcommissie.
Read the article
Need an independent acoustic assessment?
KGI Groep measures in line with NEN 5077 and delivers reports that hold up towards an owners' association, municipality, insurer or court.