Abstract: An inkjet printing method includes: preparing a shape drawing; creating an image for an inkjet printing based on a color table or a boundary table; applying the image for the inkjet printing to an inkjet apparatus; and performing the inkjet printing based on the image by the inkjet apparatus, where the creating the image for the inkjet printing includes converting the shape drawing into a vector image, converting the vector image into a raster image, and converting the raster image into the image for the inkjet printing which is a black-and-white image.

Abstract: An apparatus for measuring loss of sound traveled in a muffler of an automobile comprises: a first and second pipe between which the muffler, to be tested, is inserted; a sound source connected to one end of the first pipe opposite to the muffler to create a sound into the first and second pipes; the first microphones mounted at the first pipe to measure the level of sound before the muffler; the second microphones mounted at the second pipe to measure the level of sound after the muffler; and a non-reflect means connected to the second pipe for the sound passing through the first and second pipes so as not to reflect into them.