An optical fiber ribbon includes a plurality of optical fibers, each includes a glass optical fiber coated with a fiber coating, that are arranged in parallel, and a ribbon coating that coats the optical fibers arranged in parallel. The microphone may be formed using silicon microfabrication techniques and has sensitivity to sound pressure substantially unrelated to the size of the diaphragm over a broad range of realistic sizes. 8 mlg, wherein at most 40% of the pore volume comes from pores having a pore diameter above 35 nm and wherein at most 20% of the pore volume comes from pores having a pore diameter below 50 \u212b and above 37 \u212b, the carrier having a median pore diameter of at least 85 \u212b, wherein the product of and of the carrier is at least 34,000 \u212b\xb7m2ml. The IVMA data may be embodied as a standalone file in a text or binary, compressed format. High-pressure fluid is applied to the nozzle and the nozzle head is moved over the plane of the facet, thereby cutting the facet.