Bias Muhendislik LTD. STI.

Bias Muhendislik LTD. STI.
Bias Mühendislik,
Haluk Türksoy Arka Sok.
12/3 Altunizade-Uskudar,
+90 (216) 4745701


Bias is one of the leading companies in Turkey providing advanced engineering solutions within the scope of mechanical engineering since 1997. CAE softwares, test-measurement sales and test&measurement services are key topics. Bias have offices located in İstanbul, Ankara and İzmir and a liaison office in Bursa. Bias is operating a testing center in Gebze-TOSB (near Istanbul) and have a factory in Ankara.

Bias is producing customs test systems like homologation testing systems for automotive, special testing systems for defense, fatigue-durability testing systems, earthquake shaking tables.

Bias TOSB Automotive Testing Center is Turkey’s largest private testing center. Vibration, Shock, Climatic Chamber tests, engine dyno, nox emission measurements, fatigue&durability tests and homologation tests for automotive are being provided. Acoustics & Vibration and strain gauge measurements are the main measurement services provided by Bias.

Bias developed impedance&sound transmission loss measurement tube called TESTSENS SoundTube with admirable functionalities and cost of ownership strategy.

Bias TestSens SoundTube is a complete system solution for determining performance properties of acoustic materials and components in compliance with ISO 10534-2, ASTM E1050 and ASTM E2611 standards. TestSens SoundTube software allows determination of absorbing properties as absorption coefficient, reflection coefficient, surface impedance and material characteristic impedance and propagation wavenumber; as well as determination of insulation properties as transmission loss.

TestSens SoundTube Characterization Tools allows users to extract material intrinsic properties from impedance-transmission loss tube measurements, by using an indirect method derived from Johnson-Champoux-Allard-Lafarge material model (JCAL). These intrinsic properties are porosity, airflow resistivity, tortuosity, viscous characteristic length, thermal characteristic length and static thermal permeability. Acoustic CAE softwares (such as MSC Actran, VAOne, Comsol and similar) mostly use analytical material models as JCAL; this makes TestSens SoundTube Material Characterization System as a complete solution for your experimental and simulation needs.

  • Bias Muhendislik LTD. STI.
  • Bias Muhendislik LTD. STI.