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 Class 1 Sound Level Meter with Attached Microphone
The XL2-TA Sound Level Meter has established itself as one of the most popular class 1 measurement instruments worldwide. Its extensive basic functions coupled with the open data format allow for efficient measurements. The extended type approval for operation with an attached microphone, which was recently received in Austria, further increases the value of the instrument.
The XL2-TA Sound level Meter supports a remarkable range of functions. In addition to comprehensive level and audio recording, it also offers 1/3rd octave band analysis. Further, reverberation time measurement and a detailed FFT spectral analysis are also included as standard with the basic instrument. The XL2-TA covers a very wide range of applications - from basic noise measurement to unattended noise monitoring and building acoustics applications.
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New TalkBox Test Signal to Measure Speech Intelligibility in Schools 
The intelligibility of speech in schools is an important part of successful learning. According to the ANC (Association of Noise Consultants), the typical speech level for a teacher in the classroom (at 66.5 dB) is higher than the normal speaking level. For this reason, NTi Audio now offers the speech intelligibility test signal for the TalkBox at this level. This is a free product upgrade for all TalkBox users.
In classrooms, windows and smooth surfaces, such as walls, ceilings and tables, reflect the spoken word. These hard surfaces reverberate the sound, and can reduce the intelligibility of the speech. As a result, the students have to be more concentrated to follow the lessons presented by the teacher. Over a longer period of time, this can lead to listener fatigue and consequently compromise the success of the study effort. Therefore, good speech intelligibility in classrooms is an essential goal of every school.
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