Abstract: A method of acoustically fitting a hearing aid comprises providing a plurality of audible tones, each having a predetermined frequency through stereo headphones. The tones are provided at specific sound pressure in each ear. The patient changes the relative sound pressure in each ear until a perceived direction of source of the tone is in front of the patient. The amplification or attenuation requirements of a hearing aid are modified based on the difference in the sound pressures required for the left and right ears of the patient for perceived directional sameness for each frequency band-pass channel.

Abstract: Hearing aids and a method of acoustically fitting the hearing aids comprises providing a plurality of audible tones, each having a predetermined frequency through a pair of hearing aids being worn by a patient. The tones are provided at specific sound pressure in each ear. The patient changes the relative sound pressure in each ear until a perceived direction of source of the tone is in front of the patient. The amplification or attenuation requirements of a hearing aid are modified based on the difference in the sound pressures required for the left and right ears of the patient for perceived directional sameness for each frequency band-pass channel.

Abstract: A method of deriving individual gain compensation curves for hearing aid fitting includes providing a system that detects, measures and records head azimuth for sound direction affirmation by a patient and provides a plurality of audio signals through a plurality of test sequences to the ears of the patient, including establishing a comfortable listening level of the patient, establishing binaural balance for right and left ears, establishing loudness discomfort levels of the patient, establishing thresholds-of-hearing levels of the patient and generating a binaurally balanced measurement array of measured equal-loudness levels and measured thresholds-of-hearing levels for both left and right ears.

Abstract: A method of acoustically fitting a hearing aid comprises providing a plurality of audible tones, each having a predetermined frequency through stereo headphones. The tones are provided at specific sound pressure in each ear. The patient changes the relative sound pressure in each ear until a perceived direction of source of the tone is in front of the patient. The amplification or attenuation requirements of a hearing aid are modified based on the difference in the sound pressures required for the left and right ears of the patient for perceived directional sameness for each frequency band-pass channel.

Abstract: A method of producing an engraved image on a computer screen includes loading an image to be engraved and converting the image into a high contrast image using at least two colors. The first lighter color is used for the lighter portions of the high contrast image and a darker color is used for the darker portions of the high contrast image. Mixing of the colors is based on the luminance level of the image. A plurality of lines are drawn over the high contrast image with variations in the plurality of lines drawn being a function of the luminance of the underlying image.

Abstract: A method of producing an engraved image on a computer screen includes loading an image to be engraved and converting the image into a high contrast image using at least two colors. The first lighter color is used for the lighter portions of the high contrast image and a darker color is used for the darker portions of the high contrast image. Mixing of the colors is based on the luminance level of the image. A plurality of lines are drawn over the high contrast image with variations in the plurality of lines drawn being a function of the luminance of the underlying image.

Abstract: A method and apparatus for adding audible noise with time varying volume to audio devices are disclosed which makes the time varying volume envelope of the added audible noise proportional to the time varying volume envelope of sound for frequencies where an individual has a restricted range of perception. The method and apparatus are used to improve the audibility, speech intelligibility, and word recognition characteristics in audio devices.

Abstract: Hearing aids and a method of acoustically fitting the hearing aids comprises providing a plurality of audible tones, each having a predetermined frequency through a pair of hearing aids being worn by a patient. The tones are provided at specific sound pressure in each ear. The patient changes the relative sound pressure in each ear until a perceived direction of source of the tone is in front of the patient. The amplification or attenuation requirements of a hearing aid are modified based on the difference in the sound pressures required for the left and right ears of the patient for perceived directional sameness for each frequency band-pass channel.

Abstract: A method of producing an engraved image on a computer screen includes loading an image to be engraved and converting the image into a high contrast image using at least two colors. The first lighter color is used for the lighter portions of the high contrast image and a darker color is used for the darker portions of the high contrast image. Mixing of the colors is based on the luminance level of the image. A plurality of lines are drawn over the high contrast image with variations in the plurality of lines drawn being a function of the luminance of the underlying image.

Abstract: A method of producing an engraved image on a computer screen includes loading an image to be engraved and converting the image into a high contrast image using at least two colors. The first lighter color is used for the lighter portions of the high contrast image and a darker color is used for the darker portions of the high contrast image. Mixing of the colors is based on the luminance level of the image. A plurality of lines are drawn over the high contrast image with variations in the plurality of lines drawn being a function of the luminance of the underlying image.

Abstract: A method of producing an engraved image on a computer screen includes loading an image to be engraved and converting the image into a high contrast image using at least two colors. The first lighter color is used for the lighter portions of the high contrast image and a darker color is used for the darker portions of the high contrast image. Mixing of the colors is based on the luminance level of the image. A plurality of lines are drawn over the high contrast image with variations in the plurality of lines drawn being a function of the luminance of the underlying image.