Testsens Impedance Tube

Sound Transmission Loss and
Sound Absorption Coefficient
Measurement System

About Us

Testsens is a Bias Mühendislik company brand. Testsens team is working on development of acoustic related R&D tools since 2008. With intensive knowledge on acoustic measurement technology, Testsens team introduced sound transmission loss and sound absorption measurement system. Porosity measurement system and material characterization software are recent developments on acoustic field. Testsens team is continuously working on new developments and improvements on current products.

Testsens Impedance Tube

Proven quality – precision machined structure and highest quality subcomponents.

Testsens can be used mainly for sound transmission loss and sound absorption measurements. Testsens is compliant with ASTM E2611, ASTM E1050 and ISO 10534. Standard system has 50-6400Hz measurement range. User friendly software interface gives many flexibilities on data handling like data merging, octave band calculations, corrections and air flow resistivity approximation.


Resolution: 24-bit
Sample Rate: 102.4 kS/s
Dynamic Range: 100 dB
Input Range: ±10 Vpk
AC Coupling: 0.8 Hz
Output Signal Range: ±3.5 Vpk
IEPE signal conditioning for microphones

2×20W Amp Stereo Digital Amplifier
Power: 20W, 4ohm; 12W, 8ohm
Efficiency: 81% @ 20W, 4ohm; 88% @ 12W, 8ohm
Dynamic Range: 103dB
Signal Input: RCA gold-plated lotus signal input
Signal output: 4-wire signal output
Power Supply: DC12-15V 40W more than outer diameter of 5.5mm

Sound Pressure Level: 94 dB or 114 dB
Frequency: 250 Hz or 1 kHz
ANSI: S1.40
IEC: 60942 class 1
Ambient environmental conditions such as ambient air pressure, temperature and humidity

Freq range: 4 Hz to 70 kHz
Dyn range: 44 dB(A) to 166 dB
Sensitivity: 1.45 mV/Pa
1/4″ CCP Pressure High Quality

PDF Document

PDF Document

Air Porosity Measurement Tube For Open Porous Materials

Covers all needs for acoustic researches!

Some acoustic material models includes air porosity specifications like JCAL. Testsens porosity tube helps to define air porosity accurately.



Dimensions: 111(D) x 120(H) mm
Weight: 2 kg
Maximum sample weight: 2 kg
Material: CNC machined aluminum, black anodized
Max pressure: 100 psia (689.5 kpa)
Range: 0 to 99.5 % open porosity

Testsens Acoustic Characterization Software

Tool for acoustic modelling and parameter definition.



  • Determination of intrinsic properties with Johnson-Champoux-Allard-Lafarge (JCAL) material model. (Porosity, Flow Resistivity, Tortuosity , Viscous Characteristic Length, Thermal Characteristic Length,­ Static Thermal Permeability­).
  • Determination of dynamic density and dynamic bulk modulus.

Testsens Product Quality Check Software

Many noise signals in nature are complex in content. The main purpose of frequency analysis is to analyze these signals, from which only limited information can be obtained when analyzed in the time domain, by converting them into a “frequency spectrum” where each frequency component can be evaluated separately.

In order to understand the structural properties of any material, Testsens Product Quality Check Software performs a natural frequency analysis based on the acoustic response of the material when force (impact) is applied to it. With this examination, very useful inferences can be done related with the quality of the material. Among the ideal materials, the defective material can be easily identified.



BİAS Mühendislik

Address: Haluk Turksoy Arka St. 12/2 Altunizade, Uskudar 34662, Istanbul, Turkey

Phone: +90 216 474 57 01

e-Mail: info@testsens.com