Dear Friends and Colleagues of the Auditory Listserv,
Thank you for your ongoing contributions to auditory research. My colleagues want to collect language samples that can accurately analyze fundamental frequency, pitch range, and other acoustic properties. They are looking to purchase a microphone, pre-amp, and decibel meter that work well in tandem. Furthermore, the microphone must meet these guidelines at the minimum:
* There should be a flat frequency response (i.e., variation of less than 2 dB) across the frequency range between the lowest expected f0 of voice and the highest spectral component of interest (approximately 50–8000 Hz)
* Noise level should be at least 15 dB lower than the sound level of the quietest vocal sound
* The upper limit of the dynamic range should be above the sound level of the loudest phonations (i.e., can record the loudest voice production without saturation/clipping)
*Head-mounted, omnidirectional condenser microphone
Evidence that guided the criteria above: 1. Patel, R. R., Awan, S. N., Barkmeier-Kraemer, J., Courey, M., Deliyski, D., Eadie, T., Paul, D., Švec, J. G., & Hillman, R. (2018). Recommended Protocols for Instrumental Assessment of Voice: American Speech-Language-Hearing Association Expert Panel to Develop a Protocol for Instrumental Assessment of Vocal Function. American Journal of Speech-Language Pathology, 27(3), 887–905. https://doi.org/10.1044/2018_AJSLP-17-0009
2. Švec, J. G. & Granqvist, S. (2010). Guidelines for selecting microphones for human voice production research. American Journal of Speech-Language Pathology, 19(4), 356–368. https://doi.org/10.1044/1058-0360(2010/09-0091)
3. Šrámková, H., Granqvist, S., Herbst, C. T., & Švec, J. G. (2015). The softest sound levels of the human voice in normal subjects. The Journal of the Acoustical Society of America, 137(1), 407–418. https://doi.org/10.1121/1.4904538 Thank you for your recommendations. Regards, Tina Penman
|