1. Laboratory Services Measurements: Analysis: Bruel&Kjaer Impedance Tube Measurements Sound Absorption Coefficient Sound Transmission Loss (dB) Vibration Measurements Alpha Cabin Tests (Including Sound Transmission Loss) Acoustic Performance Analysis Optimization and Sensitivity Analysis Inverse characterization

2. Bruel&Kjaer Impedance Tube Measurements Measurement of Acoustic Performances using Impedance Tube: Sound Absorption Coefficient Sound Reflection Coefficient Impedance Ratio Admittance Ratio Sound Transmission Loss Measurements

3. Measurement Limitations  Frequency range: 50Hz- 6,4kHz  Homogeneous material  Flat-surface material  Only plane waves can propagate in the impedance tube a b a.Assembly for Sound Absorption Measurements, ISO 10534-1 b.Assembly for Transmission Loss Measurements, (ISO 10534-2) Measurements Bruel&Kjaer Impedance Tube Measurements

4. Vibration Measurements Measurements

5. Alpha Cabin Measurements The working princible of Alpha Cabin Sabine Formula α : Sound Absorption Coefficient V: Room Volume A s : Surface Area of the Material » = Measurements

6. Alpha Cabin Measurements Measurement Limitations  Frequency range : 400Hz-10kHz  Homogeneous/Nonhomogeneous Material  Flat-surface/Nonflat-surface Material  Sound Waves impact the material on every angles  Malzemenin Akustik empedansı ve Yüzey empedansı ölçülemez Design of Alpha Cabin with Two Rooms Measurements

7. Comet Trim: Performance Analysis Acoustic performance is governed by macroscobic material properties and geometric properties Modified Biot’s theory establishes a relationship between material, geometric properties and acoustic performance Evaluation of Acoustic Performance Analysis

8. Comet Trim: Performance Analysis Family of Layers Modeled in Trim Analysis

9. Comet Trim: Optimization and Sensitivity Analysis Evoulate the sensitivity of acoustical performance with respect to macroscobic properties Values above the axis: Performance will increase when the design parameter is increased Values below the axis: Performance will decrease when the design parameter is increased Design Sensitivity: An Example Analysis

10. Comet Trim: Optimization and Sensitivity Analysis Optimize macroscobic properties for desired acoustical performance Analysis

11. Comet Trim: Inverse Characterization Estimate the macroscobic properites based on measured acoustical (transmission loss and/or absorption) data Analysis

12. Overview of Our Laboratory

14. Contact Information Ufuk UZUNDA Ğ R&D Executive FORMplast YALITIM BANTLARI SAN. VE TİC.LTD.ŞTİ. GEPOSB İNÖNÜ MAH.BALÇIK YOLU ÜZERİ GEPOSB İÇİ ATATÜRK BLVR NO:7 GEBZE - KOCAELİ / TURKEY Phone : +90 262 751 45 13 - 14 - 15 Ext: 148 FAX : +90 262 751 45 11 MOBILE: +90 532 703 50 36 E-MAIL : ufuk.u@formplastyalitim.com WEB : www.formplastyalitim.com ufuk.u@formplastyalitim.comwww.formplastyalitim.com Laboratory Executive: