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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,765 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringNusshofTrefzer Rosa + Partner GmbH
Trefzer Rosa + Partner GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Trefzer Rosa + Partner GmbH is consulting and conducting measurements in the field of acoustics and vibration technology, particularly in the areas of: noise assessments and noise reduction for companies and municipalities, analysis and reduction of industrial noise in factory halls and workplaces, acceptance measurements in public transport, assessment of noise and vibration emissions from roads and railways, investigation of vibration and structure-borne sound propagation in buildings and vehicles, measurement and analysis of machine noise. The company thus offers comprehensive services in the field of noise control and vibration technology.

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Products & services

Industry:Technical Consulting & Engineering
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Trefzer Rosa + Partner GmbH

✓ Offered
6
Noise assessment reports
Noise assessment reports for companies, municipalities and private clients to comply with the LSV and SIA 181, based on measurements and calculations.
Rail noise assessments
Measurement, forecasting and assessment of noise and vibration impacts caused by roads and railways.
Vibration and structure-borne sound measurements
Expert reports and measurements of vibration and structure-borne sound propagation in buildings and vehicles, as well as investigations into its impact on people.
Machine noise measurements and noise reduction
Measurement and assessment of sound emission from machines and equipment, in particular heat pumps, as well as development of measures for noise reduction.
Industrial noise analyses
Analysis of noise conditions in factory halls and workplaces in accordance with SUVA regulations, as well as development of measures for noise reduction.
Acceptance measurements in public transport
Acceptance measurements of tram vehicles and public transport buses.
Trust & reputation

ranQ Trust Score of Trefzer Rosa + Partner GmbH

Trust Score

No score yet

x

A published score requires a data basis of at least 50% and data from at least two criteria groups other than identity. Missing evidence: Review quality, Review volume, Review recency, Media authority

Data basis 54% · As of October 2026

Trefzer Rosa + Partner GmbH has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Trefzer Rosa + Partner GmbH scores 83.0 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
Trefzer Rosa + Partner GmbH scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).83.322%
Trefzer Rosa + Partner GmbH scores 0.0 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%

The data basis is 54%, below the threshold at which ranQ publishes a score. Evidence is missing for: Review quality, Review volume, Review recency, Media authority. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

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Location

Bündtenweg 4 B
4453 Nusshof

At a glance

Legal form
Limited Liability Company
UID
CHE-109.881.448
Founded
2003 · 23 years
Last commercial register change
March 8, 2013
Employees
1 to 10
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
88.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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