Audiovisual equipment and casing thereof and method of producing the same

摘要

A casing for an audiovisual equipment presents an outer appearance giving the impression of integrating a hole area formed of a plurality of sound transmitting fine holes with the casing, thereby making the hole area unnoticeable. This allows a viewer to easily concentrate on the screen by eliminating anything noticeable from the area surrounding the screen, and also gives the outside of the casing a luxurious appearance. In order to make the hole area unnoticeable, maintain good volume and quality of sound from the speaker, and arrange the diameter od mm of the tapered fine holes to be practically the smallest, the relationship between the diameter od mm and the thickness T mm of the casing must be expressed by the following formula: (1/6) x T mm