Abstract: Embodiments are directed to measuring, on a periodic basis by a hearing device, one or more transfer functions, each of the one or more transfer functions comprising a receiver-to-microphone acoustic transfer function of the hearing device. A plurality of health indicators of the hearing device are calculated over time using a measured characteristic of each of the measured transfer functions and a nominal characteristic of each of the measured transfer functions. Using the plurality of health indicators, degradation or failure of any of the receivers, any of the microphones, or a component in an acoustic path between one or more receivers and one or more microphones is detected. One or both of recommended actions and warnings are generated in response to detecting degradation or failure of any of the receivers, any of the microphones, or the component.

Abstract: A hearing device has two or more different microphones and a processor operably coupled to the two or more microphones. The processor is operable via instructions to obtain time domain signals from the microphones and transform the time domain signals into respective frequency transform streams. The frequency transform streams characterize phase information in the time domain signals. The processor further determines, from the frequency transform streams, features indicative of directional information of one or more sound sources. The processor inputs the features to a classifier neural network. The classifier network is trained to classify the features into probabilities of angles of arrival of the sound sources. Based on the classification of the features, the processor estimates one or more directions of arrival (DOA) of the sound sources.

Abstract: A new family of compounds having anti-inflammatory, anti-viral, and brocho-dilating activity having the following linear and cyclic formulas: ##STR1## and compositions of these, which alone, and in combination with reverse transcriptase inhibitors thereby resulting in an additive or synergistic effect, are useful in inhibiting or suppressing viruses including those exhibiting retroviral replication, or in treating viruses including a retrovirus such as HIV in a human cell population and methods of using these compositions, compounds, and salts thereof.

Abstract: Beta-hydroxamate D-aspartic acid as a medicine, in particular for treating infectious diseases caused by retroviruses, especially those that cause AIDS, as well as for treating tumors.