TY - CHAP A1 - Dräger, Paul A1 - Steffens, Jochen A1 - von Berg, Markus T1 - How Does Lombard Speech Behave When The Background Noise Level Decreases? [Vortrag] T2 - Fortschritte der Akustik - DAGA 2024, 18. - 21. März 2024, Hannover N2 - The Lombard Effect and its impact on human speech production, also known as ‘Lombard Speech’, have been investigated in numerous scientific studies. It is known that the intensity, but also the type of background noise can affect Lombard Speech. By contrast, the potential effect of a gradual reduction of the amplitude of the background noise has received little attention in previous research. To test for such an effect, we split 34 participants into couples and had them orally compare images. In the experimental condition, there was background noise (masker) whose amplitude was reduced from 70 to 50 dB(A) over a period of 100 seconds. Measures of speech production after this decay were compared to those of a reference condition in which the masker was constantly at 50 dB(A). We hypothesized that speech production due to prior exposure to a louder masker would show a stronger expression of Lombard Speech in the experimental compared to the reference condition. The results showed a significant difference regarding the level of the first formant F1 across conditions, but not regarding the overall dB(A) level. However, tendencies could be identified, which can serve as a basis for further investigations. Y1 - 2024 UR - https://pub.dega-akustik.de/DAGA_2024/files/upload/paper/135.pdf SN - 978-3-939296-22-5 SP - 1259 EP - 1262 PB - Deutsche Gesellschaft für Akustik e.V. CY - Berlin ER -