Assessment of recording chain configuration during logatome and sentence lists recording
Abstract
Sentence and logatome lists are commonly used in the evaluation of speech signal quality and intelligibility in communication systems and recording applications. The reliability of such assessments depends not only on the test material itself but also on the configuration of the recording chain and measurement setup.
This paper presents an analysis of the influence of selected elements of the recording chain configuration on the spectral properties of recorded speech signals. The study focuses on the impact of microphone stand design, spatial arrangement of microphones, and polar patterns on the recorded signal. Measurements were conducted under controlled conditions in an anechoic chamber to isolate the effects of the recording system from room acoustics.
The analysis includes comparative frequency response measurements for different stand configurations, including systems with and without damping elements, as well as an investigation of the proximity effect for various polar patterns of a studio microphone. The results indicate that in near-field conditions the geometry of the recording setup and microphone characteristics dominate the spectral response, while the influence of stand structure remains limited. At greater distances, structural elements may introduce measurable deviations in the mid- and high-frequency range.
The study confirms known theoretical models under controlled conditions and provides practical insights into the design and reliability of measurement setups used in speech signal acquisition.
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