Virtual electroacoustic audiometry for unaided simulated aided,

Details Virtual electroacoustic audiometry for unaided simulated aided, Virtual electroacoustic audiometry for unaided simulated aided,

1996-12-18

1999-07-13

Lee, Thomas D.

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

Testing of hearing aids

381 231, H04R 3900

Patent

active

059237643

ABSTRACT:
A hearing evaluation and hearing aid fitting system provides a fully immersive three-dimensional acoustic environment to evaluate unaided, simulated aided, and aided hearing function of an individual. Digital filtering of signal sources representing speech and other sound stimuli according to selected models and signal processing parameters, such as audio sources, spatializing coordinates, acoustic boundaries, hearing aid simulations, and individualized transfer functions synthesizes a simulated acoustic condition for presentation to an individual for objective and subjective hearing evaluation. An intra-canal prosthesis incorporating a microphone probe is positioned in the ear canal to measure in-the-ear-canal responses at a common reference point near the tympanum during unaided, simulated aided, and aided hearing evaluation to provide measurements that directly correlate across all phases of hearing assessment during hearing aid fitting. A virtual electroacoustic audiometer computes hearing aid prescription based on unaided evaluation results and various reference measurements including in-the-ear canal responses to acoustic stimuli. The system synthesizes signals reflecting the combination of an audio signal model, spatialization model, and acoustic boundary model, as well as hearing aid model in the case of simulated aided condition. Once an optimal simulated hearing aid model is selected, based on a number of criteria including optimal performance, sound, restoration, listening preference, type, size, controls, and life-style factors, a detailed hearing aid specification is derived and provided to the dispenser/manufacturer for assembly. A modular hearing aid according to the results of such hearing assessment is also provided that includes highly configurable electroacoustic and electronic signal processing elements.

REFERENCES:
patent: 4118599 (1978-10-01), Iwahara et al.
patent: 4139728 (1979-02-01), Haramoto et al.
patent: 4219696 (1980-08-01), Kogure et al.
patent: 4759070 (1988-07-01), Voroba et al.
patent: 4774515 (1988-09-01), Gehring
patent: 4809708 (1989-03-01), Geisler et al.
patent: 5173944 (1992-12-01), Begault
Mueller, H. Gustav; "A Practical Guide to Today's Bonanza of Underused High-Tech Hearing Products," The Hearing Journal, Mar. 1993, vol. 46, No. 3, pp. 13-27.
Hawkins, David B., Ph.D.; Probe Microphone Measurements: Hearing Aid Selection and Assessment, Chapter 5, "Prescriptive Approaches to Selection of Gain and Frequency Response", pp. 91-112.
Mowrer, Donald E., Ph.D. and Steams, Carol; "Threshold measurement variability among hearing aid dispensers," Hearing Instruments, vol. 43, No. 4, 1992, pp. 26-27.
Gauthier, E.A. and Rapisardi, D.A., MS; "A threshold is a threshold is a threshold . . . or is it?", Hearing Instruments, vol. 43, No. 3, 1992, pp. 26-27.
Earphone Calibration, "Real Ear Methods", p. 26.
Valente, M; Potts, L; and Vass, Bill; "Intersubject Variability of the Real-Ear SPL: TDH-39P vs ER 3A Earphones".
Cherry, E. Colin; "Som Experiments on the Recognition of Speech, with One and with Two Ears," The Journal of the Acoustical Society of America, vol. 25, No. 5, Sep. 1953, pp. 975-979.
Cherry, E. Colin and Taylor, W.K; "Some Further Experiments upon the Recognition of Speech, with One and with Two Ears," The Journal of the Acoustical Society of America, vol. 26, No. 4, Jul. 1994, pp. 554-559.
Bronkhorst, A.W. and Plomp, R.; "The effect of head-induced interaural time and level differences on speech intelligibility in noise," J. Acoust. Soc. Am. 83 (4), Apr. 1988, pp. 1508-1516.
Bronkhorst, A.W. and Plomp, R.; "Effect of multiple speechlike maskers on binaural speech recognition in normal and impaired hearing,". Acoust. Soc. Am. 92 (6), Dec. 1992, pp. 3132-3139.
Begault, Durand R.; "Call Signal Intelligibility Improvement Using a Spatial Auditory Display," NASA Technical Memorandum 104014, Apr. 1993.
Chen, Jospeh K. and Geisler, C. Daniel, "Estimation of eardrum acoustic pressure and of ear canal length from remote points in the canal,". Acoust. Soc. Am. 87 (3), Mar. 1990, pp. 1237-1247.
Sandberg, Robert, MS; McSpaden, Jay B., Ph.D.; and Allen, Dan, MA; "Real measurement from real ear equipment," Hearing Instruments, vol. 42, No. 3, 1993, pp. 17-18.
"Selection instrumentation/master hearing aids in review," Hearing Instruments, vol. 39, No. 3, 1988, pp. 18-20.
"ITS--Hearing Aid Simulator," software brochure.
Wightman, Frederic L. and Kistler, Doris J.; "Headphone simulation of free-field listening. I: Stimulus synthesis,". Acoust. Soc. Am. 85 (2), Feb. 1989, pp. 858-867.
Wightman, Frederic L. and Kistler, Doris J.; "Headphone simulation of free-field listening. II: Psychophysical validation.". Acoust. Soc. Am. 85 (2). Feb. 1989. pp. 868-878.
Begault, Durand R. and Wenzel, Elizabeth M., NASA Ames Research Center, Moffett Field, California, "Headphone Localization of Speech," Human Factors, 1993, 35(2), 361-376.
American National Standard, Specification of Hearing Aid Characteristics, ANSI S3.22-1987.
"three-dimensional audio for PC-compatibles," The Beachtron, "Beachtron User's Guide", Crystal River Engineering, Inc.
Zdeblick, Mark J., Ph.D., "A Revolutionary Actuator for Microstructures," reprint from Sensors, Feb. 1993.
Mills, A.W., "On the Minimum Audible Angle,". Acoust. Soc. Am., vol. 30, No. 4, Apr. 1953, pp. 237-246.
Rife, Douglas D. and Vanderkooy, John; "Transfer-Function Measurement with Maximum-Length Sequences," J. Audio Eng. Soc., vol. 37, No. 6, Jun. 1989, pp. 419-442.
American National Standard, Specification for Audiometers, ANSI S3.6.1989.
Jamieson, Donald G., "Consumer-Based Electroacoustic Hearing Aid Measures," JSLPA Monogr. Suppl. 1, Jan. 1993, pp. 87-98.
Assessment of Fitting, Arrangements, Special Circuitry, and Features, pp. 221-224.

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