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Measurement of bone conduction levels for high frequencies.
Int Tinnitus J. 2002; 8(1):9-12.IT

Abstract

For assessment of safety, it is necessary to measure the maximum possible force exerted by a bone conduction device coupled to the human head. Calibration of bone conduction hearing aids and vibrators in the audiometric range is based on measurement of acceleration and force using an artificial mastoid. Extending the measurement to the high audio range was accomplished using a live head. To assess safety of the UltraQuiet tinnitus treatment system, as an example, acceleration was measured from 5 to 20 kHz on a live human head as compared with calibrated levels at 6 kHz on an artificial mastoid and the live head. Using head acceleration and anchoring it to established calibration levels is a means of establishing clinical safety. Stimulation in the high audio frequencies at low levels was found to be safe. In contrast, stimulation with ultrasound requires more energy (approximately 75-90 dB re 6 kHz), which may increase the risk of damage to the car.

Authors+Show Affiliations

Sound Technique Systems, LLC, Program in Biomedical Engineering, Virginia Commonwealth University, Richmond, VA 23298-0168, USA. lenhardt@hsc.vcu.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

14763229

Citation

Lenhardt, Martin L., et al. "Measurement of Bone Conduction Levels for High Frequencies." The International Tinnitus Journal, vol. 8, no. 1, 2002, pp. 9-12.
Lenhardt ML, Richards DG, Madsen AG, et al. Measurement of bone conduction levels for high frequencies. Int Tinnitus J. 2002;8(1):9-12.
Lenhardt, M. L., Richards, D. G., Madsen, A. G., Goldstein, B. A., Shulman, A., & Guinta, R. (2002). Measurement of bone conduction levels for high frequencies. The International Tinnitus Journal, 8(1), 9-12.
Lenhardt ML, et al. Measurement of Bone Conduction Levels for High Frequencies. Int Tinnitus J. 2002;8(1):9-12. PubMed PMID: 14763229.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Measurement of bone conduction levels for high frequencies. AU - Lenhardt,Martin L, AU - Richards,Douglas G, AU - Madsen,Alan G, AU - Goldstein,Barbara A, AU - Shulman,Abraham, AU - Guinta,Robert, PY - 2004/2/7/pubmed PY - 2004/2/28/medline PY - 2004/2/7/entrez SP - 9 EP - 12 JF - The international tinnitus journal JO - Int Tinnitus J VL - 8 IS - 1 N2 - For assessment of safety, it is necessary to measure the maximum possible force exerted by a bone conduction device coupled to the human head. Calibration of bone conduction hearing aids and vibrators in the audiometric range is based on measurement of acceleration and force using an artificial mastoid. Extending the measurement to the high audio range was accomplished using a live head. To assess safety of the UltraQuiet tinnitus treatment system, as an example, acceleration was measured from 5 to 20 kHz on a live human head as compared with calibrated levels at 6 kHz on an artificial mastoid and the live head. Using head acceleration and anchoring it to established calibration levels is a means of establishing clinical safety. Stimulation in the high audio frequencies at low levels was found to be safe. In contrast, stimulation with ultrasound requires more energy (approximately 75-90 dB re 6 kHz), which may increase the risk of damage to the car. SN - 0946-5448 UR - https://www.unboundmedicine.com/medline/citation/14763229/Measurement_of_bone_conduction_levels_for_high_frequencies_ L2 - https://medlineplus.gov/hearingaids.html DB - PRIME DP - Unbound Medicine ER -