This paper is a research study on using acoustic techniques to measure particle concentrations in cylindrical tubes. Key details from the paper include:
: The study identified significant differences between predicted and measured frequency dependence in ultrasonic measurements and proposed methods for isolating acoustic transducers from flow using clean air. Moss.Book.II.part1.rar
The search result for "Moss.Book.II.part1.rar — useful paper" appears to refer to an academic thesis by (1993) titled " Acoustic measurements of flowing and quasi-static particulate suspensions ." This paper is a research study on using