Measurement of Sound Reflection Coefficients as a Function of Frequency in an Undamped Tank
- 16 Downloads
We discuss a technique for measuring the frequency-dependent acoustic reflection coefficient of a material under test in a tank where the acoustic waves reflected by the tank surfaces cannot be neglected. The effectiveness of this technique was assessed by measuring the reflection coefficient at the air–water and water–reinforced-concrete interfaces. We describe the experimental results obtained at low frequencies (down to a few tens of hertz), in addition to several special considerations that apply to low-frequency measurements.
Keywordssound reflection coefficient hydroacoustic tank complex weighted moving average
- 1.R. J. Bobber, Underwater Electroacoustic Measurements [Russian translation], Mir, Moscow (1974).Google Scholar
- 2.A. N. Matveev, Development and Study of Methods for Calibration for a Hydroacoustic Detector When Emitting Linear Frequency Modulation Signals: Auth. Abstr. Dissert. Cand. Techn. Sci., VNIIFTRI, Mendeleevo (2015).Google Scholar
- 4.A. E. Isaev and A. S. Nikolaenko, “Laboratory free-field calibration of a hydroacoustic receiver at low frequencies,” Izmer. Tekhn., No. 1, 54–59 (2018).Google Scholar
- 5.I. A. Rumynskaya, Fundamentals of Hydroacoustics, Sudostroenie, Leningrad (1979).Google Scholar