A Simple Method to Obtain Basic Acoustic Measures from Video Recordings as Subtitles

Autor/inn/en	Kumar, S. Pravin; Švec, Jan G.
Titel	A Simple Method to Obtain Basic Acoustic Measures from Video Recordings as Subtitles
Quelle	In: Journal of Speech, Language, and Hearing Research, 61 (2018) 9, S.2196-2204 (9 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
DOI	10.1044/2018_JSLHR-S-17-0472
Schlagwörter	Acoustics; Video Technology; Measurement Techniques + Suchen Sie Ihr Suchwort? Akustik; Messtechnik
Abstract	Purpose: Sound pressure level (SPL) and fundamental frequency (f[superscript o]) are very basic and important measures in the acoustical assessment of voice quality, and their variation influences also the vocal fold vibration characteristics. Most sophisticated laryngeal videostroboscopic systems therefore also measure and display the SPL and f[superscript o] values directly over the video frames by means of a rather expensive special hardware setup. An alternative simple software-based method is presented here to obtain these measures as video subtitles. Method: The software extracts acoustic data from the video recording, calculates the SPL and f[superscript o] parameters, and saves their values in a separate subtitle file. To ensure the correct SPL values, the microphone signal is calibrated beforehand with a sound level meter. Results: The new approach was tested on videokymographic recordings obtained laryngoscopically. The results of SPL and f[superscript o] values calculated from the videokymographic recording, subtitles creation, and their display are presented. Conclusions: This method is useful in integrating the acoustic measures with any kind of video recordings containing audio data when inbuilt hardware means are not available. However, calibration and other technical aspects related to data acquisition and synchronization described in this article should be properly taken care of during the recording. (As Provided).
Anmerkungen	American Speech-Language-Hearing Association. 2200 Research Blvd #250, Rockville, MD 20850. Tel: 301-296-5700; Fax: 301-296-8580; e-mail: slhr@asha.org; Web site: http://jslhr.pubs.asha.org
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01