matrix | mātriks|
noun (pl. -trices |ˈmātrisēz| or -trixes)

1 an environment or material in which something develops; a surrounding medium or structure : free choicesbecome the matrix of human life.
• a mass of fine-grained rock in which gems, crystals, or fossils are embedded.
• biology the substance between cells or in which structures are embedded.
• fine material : the matrix of gravel paths is raked regularly.
2 a mold in which something, such as printing type or a phonograph record, is cast or shaped.
3 mathematics a rectangular array of quantities or expressions in rows and columns that is treated as a single entity and manipulated according to particular rules.
• an organizational structure in which two or more lines of command, responsibility, or communication may run through the same individual.
ORIGIN late Middle English (in the sense [womb] ): from Latin, ‘breeding female,’ later ‘womb,’ from mater,matr- ‘mother.’

matrix is a series of sound installations employing pure sine waves and white noises as a sculptural material. The installations are designed in response to specific gallery spaces or public sites selected by Ikeda. Sine wave are one of the purest forms of sound, white noise contains the full frequency spectrum randomly. As visitors pass through the sound field, subtle oscillation patterns occur around their ears, caused by their own movements interfering with the sounds. It is a very personal experience, and only through the visitors' physical engagement in the sound space can the real character of the work be perceived.