A headset terminal for speech applications includes a headband assembly, an earcup assembly and a power source assembly. Processing circuitry is positioned in at least one of the earcup assembly and the power source assembly and includes speech processing circuitry for recognizing and synthesizing speech. A radio communicates with a central system to process the activity information of the headset terminal user. A rotatable microphone boom assembly includes controls mounted on opposite sides of a rotation axis to maintain a consistent orientation on the boom assembly with respect to the head of a user. The boom assembly snaps together with the earcup assembly to rotate. The headband assembly includes at least one transverse band and a sliding arm coupled to the earcup assembly for dynamically adjusting the position of the earcup assembly. A latch of the power source assembly snaps into position to secure it with the assembly and slides between latched and unlatched positions to secure a battery.

Headset terminal with speech functionality

A speech recognition system includes speech presence detection which uses a first level threshold of ambient noise/silence above which speech start is decided for a signal. Speech end is decided when the signal falls to a second threshold equal to the first, unless a predetermined time interval of speech is exceeded after start, causing a corrected second threshold to be calculated and used.

Speech recognition system for an automotive vehicle

Methods and apparatus are described for effecting multi-band processing of an original sampled signal. The original sampled signal is separated (44) into a plurality of signal components each corresponding to one of a plurality of frequency bands wherein each band is independently processed (60, 62, 64). A dynamic range associated with each one of the plurality of signal components is independently and dynamically controlled (52). At least one signal level associated with the plurality of signal components is modified (46, 48, 50, 58). The signal components are combined (66) into a processed sampled signal.

Digital signal processing techniques for improving audio clarity and intelligibility

A headset adapted to be positioned on a head includes a headband assembly for spanning across the head of a user An earcup assembly is coupled proximate one end of the headband assembly A power source assembly is coupled proximate the other end of the headband assembly A flexible stabilizing strap has a first end coupled to the headset proximate the earcup assembly and a second end coupled to the headset terminal proximate the power source assembly The strap includes a first band portion that couples with a second band portion, at least one band portion including a plurality of coupling positions along its length for adjustably coupling with the other band portion at different lengths to vary the overall length of the flexible stabilizing strap The stabilizing strap is adapted to engage the head of a user to further stabilize the headset on the head

Headset terminal with rear stability strap

A headset for communication with a device is configured for processing audio signals captured by the headset to detect user speech and transmitting, to the device, sampled representations of the captured audio signals generally only when user speech is detected.

Wireless headset for use in speech recognition environment

Each subscriber station of the intercommunication system has a transmitter (microphone) and a receiver in the form of headphones or a loudspeaker, and a signal processing unit, such as an amplifier, radio link etc. The signal processing unit has frequency filters, to which signals from the transmitters of subscriber stations are applied. They separate the speech band of 300 Hz to 3000 Hz from the noise band outside the former. The speech signal is applied to a threshold circuit whose threshold value increases with increasing noise. The transmission of speech signals is stopped in detected pauses.

Intercommunication system with several subscriber stations - has filters separating speech signals from noise and threshold circuit varying with noise level

Hauser Franz Ing Grad

Papers

Intercommunication system with several subscriber stations - has filters separating speech signals from noise and threshold circuit varying with noise level