You may hear installation engineers repeating the phrase "test, one, two" while setting up microphones. They are not practicing counting; they are checking the frequency response of the microphone. The "uhn" sound of the word "one" produces a low vocal frequency, while the ‘t’ sound in ‘two’ produces a high vocal frequency. (Counting "three, four" adds no more value except perhaps to demonstrate that we installation engineers can, in fact, count past two.)
The NTi Audio TalkBox simplifies and improves the setup of microphones by generating a reference human speech signal or other standard audio test signals, so that all frequencies (not just the frequencies produced by "one, two") can be efficiently adjusted by a single person.
The TalkBox generates all test signals for professional conference room commissioning. Simply position the TalkBox at each speaking position.
The NTi Audio TalkBox generates the speech intelligibility test signal into the talker's microphone for STIPA measurements with the XL2 Analyzer.