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Development of the Polish Speech Test Signal and its Comparison with the International Speech Test Signal

Habasińska D., Skrodzka E., Bogusz-Witczak E.

Archives of Acoustics

2018

Vol. 43, No. 2

253--262

The aim of this study was to create a single-language counterpart of the International Speech Test Signal (ISTS) and to compare both with respect to their acoustical characteristics. The development procedure of the Polish Speech Test Signal (PSTS) was analogous to the one of ISTS. The main difference was that instead of multi-lingual recordings, speech recordings of five Polish speakers were used. The recordings were cut into 100-600 ms long segments and composed into one-minute long signal, obeying a set of composition rules, imposed mainly to preserve a natural, speech-like features of the signal. Analyses revealed some differences between ISTS and PSTS. The latter has about twice as high volume of voiceless fragments of speech. PSTS’s sound pressure levels in 1/3-octave bands resemble the shape of the Polish long-term average female speech spectrum, having distinctive maxima at 3-4 and 8-10 kHz which ISTS lacks. As PSTS is representative of Polish language and contains inputs from multiple speakers, it can potentially find an application as a standardized signal used during the procedure of fitting hearing aids for patients that use Polish as their main language.

Multimedia applications for the hearing impaired

Czyżewski A., Skarżyński H.

Archives of Acoustics

2007

Vol. 32, No. 3

491--504

Hearing impairment is one of the fastest growing diseases of modern society. Therefore it is very important to develop new methods for diagnosis and therapy of hearing disorders. Some of them were introduced to practice as a result of a co-operation between institutions mentioned in the header. The system for mass-scale hearing screening is one of multimedia programs for testing communication senses introduced by the authors. The further developments include among others an application of dithering theory to practical solutions for tinnitus patients and a method of fitting hearing aids employing soft computing. The implemented hearing diagnostic & therapy applications and systems with their underlying concepts are reviewed in this paper.