Particle size distribution characterization from acoustic emissions

A detailed study of the acoustic signals emitted by colliding particles has led to increased precision in the determination of average particle size through an acoustic method and the derivation of methods for characterizing the shape and width of the size distributions of beds of particles. [1978]
See also previous publications by the author.

https://www.sciencedirect.com/science/article/abs/pii/0032591078800242

Shaking a Box to Estimate the Property of Content

[pages 564-576]
This paper describes an approach for implementing such a device; the development of a haptic device and control system as well as the modeling and simulation of a virtual box and its
contents are presented in this paper. The prototype system was evaluated, and different model parameters were experimentally tested.

https://link.springer.com/chapter/10.1007/978-3-642-31401-8_50