| Zugriffsnummer | 41205 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Does airborne ultrasound lead to an activation of the auditory cortex? |
| Autor(in); Institution |
Kühler, Robert; ITAP Oldenburg, Oldenburg, GERMANY
Weichenberger, Markus; Charite Berlin, Berlin, GERMANY
Bauer, Martin; 2.6, Elektrische Quantenmetrologie, PTB-Braunschweig
Hensel, Johannes; 1.6, Schall, PTB-Braunschweig
Brühl, Rüdiger; 8.1, Biomedizinische Magnetresonanz, PTB-Berlin
Ihlenfeld, Albert; 8.1, Biomedizinische Magnetresonanz, PTB-Berlin
Ittermann, Bernd; 8.1, Biomedizinische Magnetresonanz, PTB-Berlin
Sander-Thömmes, Tilmann; 8.2, Biosignale, PTB-Berlin
Kühn, Simone; Uniklinikum Hamburg, Hamburg, GERMANY
Koch, Christian; 1.6, Schall, PTB-Braunschweig
|
| Quelle/Jahr | Biomedizinische Technik: 64 (2018), 4, 1 - 13 |
| ISSN | 1862-278X |
| DOI | |
| Verlag | Berlin: De Gruyter |
| Klassifikationscode | PACS: 43.35.+d ; PACS: 43.64.+v |
| Freie Schlagworte | Airborne ultrasound ; brain imaging ; Hearing threshold |
| Zusammenfassung | As airborne ultrasound can be found in many technical applications and everyday situations, the question as to whether sounds at these frequencies can be heard by human beings or whether they present a risk to their hearing system is of great practical relevance. To objectively study these issues, the monaural hearing threshold in the frequency range from 14 to 24 kHz was determined for 26 test subjects between 19 and 33 years of age using pure tone audiometry. The hearing threshold values increased strongly with increasing frequency up to around 21 kHz, followed by a range with a smaller slope toward 24 kHz. The number of subjects who could respond positively to the threshold measurements decreased dramatically above 21 kHz. Brain activation was then measured by means of magnetoencephalography (MEG) and functional magnetic resonance imaging (fMRI) and with acoustic stimuli at the same frequencies, with sound pressure levels (SPLs) above and below the individual threshold. No auditory cortex activation was found for levels below the threshold. Although test subjects reported audible sounds above the threshold, no brain activity was identified in the above-threshold case under current experimental conditions except at the highest sensation level, which was presented at the lowest test frequency. |
| Kostenfreier Zugang | Open Access Hybrid |
| Rechteinformation | CC BY-NC-ND 4.0 ; Creative Commons Attribution NonCommercial NoDerivatives 4.0 License |
| Themenbereich der Metrologie | Akustik, Ultraschall, Beschleunigung |
Zitierung
Kühler, R., Weichenberger, M., Bauer, M., Hensel, J., Brühl, R., Ihlenfeld, A., Ittermann, B., Sander-Thömmes, T., Kühn, S., & Koch, C. (2018). Does airborne ultrasound lead to an activation of the auditory cortex? Biomedizinische Technik, 64(4), 1–13. https://doi.org/10.1515/bmt-2018-0048