The February 2015 edition of audioXpress has arrived!

audioXpress February features an eclectic mix of articles touching on radically different audio technologies, from classic tube microphones to the most advanced audio processing software available. Don’t miss our reviews of Blue Microphones’ Mo-Fi Active Headphones and Native Instruments' Molekular. Headphones, wireless audio and how to use an Arduino microcontroller to build an automatic power controller for a tube power amplifier.

Public address systems in public spaces have to clearly inform persons in danger about escape information and directions in case of an emergency. NTi Audio’s XL2 Acoustic Analyzer reliably measures the Speech Transmission Index (STI) and the results can be imported into the STI Reporting Tool which now also assigns the same ambient noise spectrum to multiple speech intelligibility measurement results.

NTi Audio’s XL2-TA Sound Level Meter is the first type approved sound level meter with a certified input keypad for legal noise nuisance assessment. The combination of an XL2-TA Sound Level Meter for Noise Monitoring in combination with the external Input Keypad meets the requirements of the standard IEC 61672 with immediate marking of noise events and annoyance complaints.

A tailored solution from NTi Audio for outdoor noise monitoring is now available for the XL2 Sound Level Meter. The new outdoor measurement microphone M2230-WP and the heavy-duty outdoor case ideally complement the XL2 system for unattended noise monitoring.

Data Explorer is a PC-based software application providing comprehensive analysis and reporting of noise data obtained from the XL2 Sound Level Meter from NTi Audio. The software now offers an extensive analysis of spectral noise data and the calculation of Day-Night-Levels for noise annoyance reporting.

Loudspeaker inspection at PA rental companies can be achieved using NTi Audio’s RT-Speaker software (Standard Edition), together with the FX100 Audio Analyzer. The system offers both acoustic and electrical tests that can be set up and executed within a few seconds on returned loudspeakers.