Abstract: A percussion instrument including a first acoustic chamber housing having a tapered shape, a second acoustic chamber housing having the tapered shape, a sound board having the tapered shape arranged between the first acoustic chamber housing and the second acoustic chamber housing to form a first acoustic chamber defined by the first acoustic chamber housing and the sound board, and a second acoustic chamber defined by the second acoustic chamber housing and the sound board.

Abstract: A network attached storage (NAS) caching appliance, system, and associated method to detect out-of-band accesses to a networked file system.

Abstract: A percussion instrument including an acoustic chamber housing having a zigzag shape, a material chamber housing having the zigzag shape, a sound board having the zigzag shape arranged between the acoustic chamber housing and the material chamber housing to form an acoustic chamber defined by the acoustic chamber housing and the sound board, and a material chamber defined by the material chamber housing and the sound board, and particulate material arranged in the material chamber.

Abstract: A percussion instrument including a first acoustic chamber housing having a tapered shape, a second acoustic chamber housing having the tapered shape, a sound board having the tapered shape arranged between the first acoustic chamber housing and the second acoustic chamber housing to form a first acoustic chamber defined by the first acoustic chamber housing and the sound board, and a second acoustic chamber defined by the second acoustic chamber housing and the sound board.

Abstract: A percussion instrument including an acoustic chamber housing having a zigzag shape, a material chamber housing having the zigzag shape, a sound board having the zigzag shape arranged between the acoustic chamber housing and the material chamber housing to form an acoustic chamber defined by the acoustic chamber housing and the sound board, and a material chamber defined by the material chamber housing and the sound board, and particulate material arranged in the material chamber.

Abstract: A wind tunnel device defines a cyclical tunnel to receive continuous airflow. Airflow is delivered through the tunnel to a testing region that includes a first portion carrying an arm including a spray tip configured to spray particulates in the testing region at an angle, and a second portion including an enlarged cutout region configured to receive the angled sprayed particulates. As airflow carries the angled spray particulates into the second portion, the enlarged cutout region enables the spray particulates to pass through and exit the second portion of the testing region. Analysis in the second region may be conducted through transparent walls free of openings to minimize exposure of the spray particulates to the exterior of the device. A scrubber is adapted to extract spray mist from the airflow as the airflow exits the testing region and is re-circulated through the cyclical tunnel.