PRODUCT DATA Outdoor Measurement Microphones The Outdoor Measurement Microphones offer a weather-protected measurement solution for the XL2 Sound Level Meter allowing acquisition of environmental noise data in outdoor applications. The corrosion-free polymer housing, wind screen, waterrepellent membrane and bird spike provide excellent protection from rain, wind, dust and perching birds. The Outdoor Measurement Microphones M2230-WP and M2340-WP fulfill the Class 1 requirements according to IEC 61672 and ANSI S1.4 for vertical sound incidence. For compliance with horizontal sound incidence a spectral correction is employed in the associated XL2 Sound Level Meter. The Outdoor Measurement Microphone M4261-WP fulfills the Class 2 requirements accordingly. The outdoor microphones consist of a measurement microphone and the applicable weather protection: • M2230-WP: M2230 + WP30 Weather Protection Outdoor Measurement Microphone with ASD Cable and Stand • M2340-WP: M2340 + WP30 Weather Protection • M4261-WP: M4261 + WP61 Weather Protection Features — Class 1 and Class 2 Outdoor Measurement Microphones for vertical and horizontal sound incidence according IEC 61672 and ANSI S1.4 (with XL2) — Excellent protection from rain and dust (IP54), wind and perching birds — Built from corrosion-free materials — Removable top section for easy microphone calibration — Standard tripod mount, optional pole mount

The 90 mm wind screen protects the measurement microphone from rain and dust while reducing wind-induced noise by approximately 15 dB. The seamless design of the water-repellent membrane under the wind screen ensures perfect protection from rain and dust. SYSTEM SELF-TEST The Outdoor Measurement Microphone M2340-WP is system self-test (CIO) enabled. Automated self-tests may be performed by NoiseScout, the unattended noise monitoring solution, in combination with the XL2 Sound Level Meter. This ensures reliable operation and precise measurements. Robust design / Easy calibration The upper section...