Abstract: A stimulus waveform is processed using a model of the human auditory system to provide a plurality of output waveforms. Each output waveform corresponds to excitation at different locations along the basilar membrane in the cochlea, and matches the narrow frequency bandwidth, short time response, and wave propagation characteristics of the human cochlea. Primary feature detection is achieved by comparing response waveforms and their spatial and time derivatives to predetermined stereotypes. Secondary feature detection is achieved by comparing spatial and temporal patterns of primary features with patterns stereotypical of human speech elements.

Abstract: An MDR data record collection and reporting system collects MDRs of various formats from PBX and telephone company Centrex switches of different types, for multiple customers. A set of switches is monitored by a monitor. The monitor includes one message processor connected to each switch, and an administrator processor, which is connected to all message processors for that set of switches. Each message processor captures MDRs from the switch to which it is connected. After the MDR has been captured, the message processor reformats the MDR from a format used on that type of switch into a selected format. The message processor also collects and sends statistics and alarms to the administrator processor. The administrator processor prepares statistical reports and alarm reports. Multiple monitors can be included within a telephone system. A collector is provided which can receive reformatted MDRs from one or more monitors, and can store reformatted MDRs for customers with sets of switches at multiple locations.