NTi Audio M4261 Measurement Microphone

The NTi Audio M4261 is a cost-effective Class 2 measurement microphone designed for reliable general-purpose acoustic testing. Intended for use with the XL2 and XL3 Sound Level Analyzers, it is well-suited for tasks such as commissioning, troubleshooting, and servicing of audio and acoustic installations. Its omni-directional, free-field design ensures consistent response across a wide frequency range of 5 Hz to 20 kHz.

The NTi Audio M4261 features an integrated electronic data sheet that stores model identification, sensitivity, and calibration information. When connected to a compatible analyzer, NTi Audio’s Automated Sensor Detection (ASD) system automatically retrieves and applies this data, ensuring accurate and consistent measurement results. The microphone operates on standard 48 V phantom power and is an excellent choice for users needing a dependable yet economical solution for acoustic analysis.

Features

• Class 2 measurement microphone for general sound level testing
• Omni-directional, free-field design for consistent acoustic response
• Frequency range from 5 Hz to 20 kHz
• Optimised for use with XL2 and XL3 analyzers
• Automated Sensor Detection (ASD) for automatic recognition of model, sensitivity, and calibration data
• 48 V phantom powered for reliable operation
• Ideal for commissioning, servicing, and acoustic installation checks

Outdoor Measurement Microphones
The Outdoor Measurement Microphones offer a weather-protected measurement solution for the 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 horizontal and vertical sound incidence. For compliance with horizontal sound incidence a spectral correction is employed in the associated Sound Level Meter. The Outdoor Measurement Microphone M4262-WP fulfills the Class 2 requirements accordingly.

The outdoor microphones consist of a measurement microphone and the applicable weather protection:

• M2230-WP: M2230 + WP40-90 Weather Protection
• M2340-WP: M2340 + WP40-90 Weather Protection
• M4262-WP: M4262 + WP62 Weather Protection

Outdoor Measurement Microphones Features

• Class 1 and Class 2 Outdoor Measurement Microphones for horizontal and vertical sound incidence according IEC 61672 and ANSI S1.4
• 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
• Effective outdoor protection

The 90 mm wind screen protects the measurement microphone from rain and dust while reducing wind-induced noise. The seamless design of the water-repellent membrane under the wind screen ensures perfect protection from rain and dust.