Abstract: A hand-held acoustic audio assistant receives exterior sound signals, and calculates and analyzes these signals to generate corresponding sound pressure/electrical signal levels and frequency spectrum. The results are stored in a memory unit or a memory card. The analyzed sound samples can be further directly heard via earphones. An acoustic audio specialist equipped with the hand-held acoustic audio assistant can thereby perform analysis for surrounding sounds in real time.

Abstract: A multifunction acoustic/audio assistant includes a hand-held device body, a ruler, and all observation device. A rear side of the hand-held device body is provided with a measure face defined thereon to measure an intersection angle of microphones. The ruler is mounted onto a side face of the hand-held device body proximate to the measure face in order to measure the distance between the respective diaphragms of the microphones. The observation device is mounted onto the hand-held device body to determine the sound dispersion area and remotely observe distant events. The different tools demanded by an acoustic/audio specialist are thus integrated into the hand-held device.

Abstract: A control device for mixing and positioning voices comprises at least one input audio channel controllers, at least one output audio channel controllers, and at least one preset changing main controller. Each input audio channel controller further comprises an input electric balance controller, an input to output connection controller; and a main controlling loop selector. Each preset changing main controller further comprises a change control button and a change selector. The voice output is set according to visual viewpoint and movement viewpoint. When a viewpoint of an image changes or movements, the viewpoint and position of the position are also changed. The setting of voice positioning must be designed to match the visual viewpoint.