Spherical loudspeaker housing consists of concrete - applied manually on inner surface of shape made of two half-shells, housing has irregular surface structure

摘要

A spherical loud speaker housing consists of concrete, which is applied manually on the inner surface fo a correspondingly designed shape (10,11). The shape (10,11) is made of two half-shells and the concrete linings (8) of the two shells (10,11) are spread seamlessly together in the joining section. The inner surface of the resulting housing has an irregular structure dictated by the manual application process. ADVANTAGE - The loudspeaker has optimum acoustic and resonance properties.