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Vehicle Systems and Driver Modelling

DSP, human-to-vehicle interfaces, driver behavior, and safety

Ed. by Abut, Huseyin / Hansen, John / Schmidt, Gerhard / Takeda, Kazuya / Ko, Hanseok

Series:Intelligent Vehicles and Transportation

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Publication Date:
September 2017
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15. How to create a clean Lombard speech database using loudspeakers

Lüke, Christian / Theiß, Anne / Schmidt, Gerhard / Landgraf, Rabea / John, Tina / Niebuhr, Oliver


The Lombard effect is a phenomenon of increasing the vocal effort that people develop due to, amongst others, the presence of background noise. For example, if the background noise level rises, both pitch and loudness of the voice usually increase, but also the duration of individual speech sounds and the diction may change. In order to investigate this effect in different noise scenarios within either a soundproof room or a car, a reproducible and easily changeable acoustic ambiance simulation has been developed and is presented in this chapter. The noise simulation uses loudspeakers instead of the usual approachwhich uses closed headphones. This increases the realism of the noise scenario for the subject and consequently also the ecological validity of the Lombard speech recordings. To remove the simulated noise from the recordings of the subject’s microphone signal, multichannel signal processing has been implemented to achieve nearly the same speech quality as with a common headset-based noise simulation.

Citation Information

Christian Lüke, Anne Theiß, Gerhard Schmidt, Rabea Landgraf, Tina John, Oliver Niebuhr (2017). 15. How to create a clean Lombard speech database using loudspeakers. In Huseyin Abut, John H.L. Hansen, Gerhard Schmidt, Kazuya Takeda, Hanseok Ko (Eds.), Vehicle Systems and Driver Modelling: DSP, human-to-vehicle interfaces, driver behavior, and safety (pp. 209–226). Berlin, Boston: De Gruyter. https://doi.org/10.1515/9781501504129-016

Book DOI: https://doi.org/10.1515/9781501504129

Online ISBN: 9781501504129

© 2017 Walter de Gruyter GmbH, Berlin/Munich/BostonGet Permission

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