Hearing threshold, loudness, and annoyance of infrasonic versus non-infrasonic frequencies
Ville Rajala, Jarkko Hakala, Reijo Alakoivu, Ville Koskela, Valtteri Hongisto
Abstract
Funding Information: Nineteen voluntary persons (15 female, 4 male) participated in the experiment. The participants were native Finnish speakers and their age ranged from 19 to 26 years (mean 23, standard deviation 2). The participants received a 30 € gift token as a compensation for their participation. The research plan was supported by the ethic committee of Turku University of Applied Sciences (25th Feb 2019, No. 2019–018). Funding Information: The work was funded by Turku University of Applied Sciences Ltd. and Wärtsilä Finland Ltd. Thanks belong to Mika Lindgren for careful design and manufacturing of the test chamber. Publisher Copyright: © 2022 The Author(s)