Abstract: Sound pressure level limiter with anti-startle feature for audio systems are disclosed. The anti-startle feature may be implemented with a delta incident detector for detecting delta acoustic incidents that exceed a predetermined acoustic startle boundary, a delta limiter for determining an anti-startle gain, and an amplifier to apply the anti-startle gain to the input signal. The delta incident detector may detect delta incidents based on an estimated true SPL delivered by a transducer to a predetermined datum point. The estimated true SPL may be determined by based on a measured receiving frequency response of the transducer. An SPL limiter may also determine an SPL gain in response to detecting an SPL acoustic incident that exceeds a predetermined SPL threshold, and an amplifier may apply the SPL gain to the input signal to reduce it below the threshold.

Abstract: Systems and methods for generating performance metrics to monitor and/or enhance the performance of telephone-intensive personnel are disclosed. The method generally includes detecting voice activity on a receive and/or a transmit channel in a communications system, outputting voicing decision outputs based on the detecting, storing the voicing decision outputs over a period of time to memory, and generating voice activity performance metrics based on the voicing decision output stored in the memory. The generating may include generating a running average ratio of duration of voice activity on the transmit channel to duration of voice activity on the receive channel (talk-listen ratio) over a certain period of time for one or more agents. The talk-listen ratio may be compared to a target ratio.

Abstract: An adaptive transmit amplifier for automatically adjusting the transmit output characteristics of a headset adapter output stage includes a detector adapted to detect a value of a bias current in a host microphone transmit circuit. The adaptive transmit amplifier further includes a switching stage coupled to the detector and adapted to select a gain level and impedance level of the headset adapter output stage based upon the bias current value. The adaptive transmit amplifier may further include a logic/timing block coupled to the detector and to the switching stage. The logic/timing block is adapted to control a sequence of detection of the bias current and selection of the gain level and impedance level of the headset adapter output stage.