The M2230-WP is a weather-protected microphone solution for the XL2 Sound Level Meter allowing acquisition of environmental noise data in outdoor applications. The corrosion-free polymer housing, wind screen, water-repellent membrane and bird spike provide excellent protection from rain, wind, dust and perching birds. The outdoor microphone M2230-WP fulfills IEC 61672 Class 1 as well as the ANSI S1.4 Type 1 requirements for vertical sound incidence. For compliance with horizontal sound incidence a frequency compensation is employed in the associated XL2 Sound Level Meter. The M2230-WP consists of an M2230 microphone fitted into a WP30 weather protection kit. An existing M2230 microphone can thus be converted to an M2230-WP by enclosing the microphone in the WP30 weather protection kit.