Einfluss tieffrequenter Störgeräusche auf die Sprachverständlichkeit

Diploma Thesis (Acrobat Reader 15.461 KB)

The improvement of speech intelligibility has become an important part in the wide field of acoustics, especially in acoustical designing of rooms. In opposition to conventional ideas some experts hold the view that attenuation of low frequencies below 200Hz improves speech intelligibility significantly.

In this diploma theses the real influence of low frequencies to speech intelligibility is investigated. Therefore, various masked thresholds are determined to measure the effect of simultaneous masking quantitatively. Furthermore, tests with logatoms are conducted to show the influence of reverberation and background noise on speech intelligibility. In a second step it should be analysed if its possible to predict the degree of speech intelligibility by standard measurements (calculated from the impulse response). In future this results should support the optimal acoustical room designing.