Certain embodiments of the present disclosure provide an acoustic inlet barrel of an engine. The acoustic inlet barrel may include an inner barrel configured to provide a boundary for directing airflow through the engine. The inner barrel may include an inner face sheet separated from an outer face sheet by an acoustic core. The inner barrel may include a plurality of elongated, non-circular perforations formed through the inner face sheet.

Certain embodiments of the present disclosure provide an acoustic inlet barrel of an engine. The acoustic inlet barrel may include an inner barrel configured to provide a boundary for directing airflow through the engine. The inner barrel may include an inner face sheet separated from an outer face sheet by an acoustic core. The inner barrel may include a plurality of elongated, non-circular perforations formed through the inner face sheet.

A method and apparatus for controlling lateral drilling for accurate placement of laterally running conduit for electrical, fluid or gas piping. The disclosure provides a stable platform which is adjustable and may be quickly assembled in a basement or subterranean building area to allow accurate placement of lateral deep drilling to provide connection between a below grade space, through a foundation wall and through soil to place the termination point of the desired hole very close to a target location. The apparatus can be driven with an internal drill or a hand drill to drive a screw-like mechanism forward once the geometry of the intended conduit drilling is set up.