Abstract: A headset comprises a headband for supporting the headset on a user's head, an earpiece including an audio driver and a microphone boom including a microphone. The microphone boom is rotatable when the headset is located on a user's head from an operative position in which the microphone boom is directed towards the user's mouth to a stowed position in which the microphone boom is at least partially received in a recess defined in the headset.

Abstract: A headset comprises a headband for supporting the headset on a user's head, an earpiece including an audio driver and a microphone boom including a microphone. The microphone boom is rotatable when the headset is located on a user's head from an operative position in which the microphone boom is directed towards the user's mouth to a stowed position in which the microphone boom is at least partially received in a recess defined in the headset.

Abstract: A system for recalibrating a remote electronic control system, such as an engine control module (ECM), includes a computer maintaining a database of calibration upgrades and a history of recalibrations for specifically identified ECMs. Software routines determine whether the recalibration history includes the latest calibration upgrades, and if not, automatically downloads those upgrades to the ECM. The software also compares an access password for the ECM to entries in a library of acceptable passwords, and if a match therebetween is found access to the ECM is allowed for downloading recalibration information thereto. The system also contemplates a protocol for verifying the integrity of data downloaded from the ECM to the computer. Types of data susceptible to error are identified, and the downloaded information is evaluated to determine if the susceptible types of data are present. If so, and if correctable errors exist, the downloaded trip information is corrected.