Abstract: Apparatus and methods are described herein for recognizing repeated patterns in audio data. An audio input is compared to search terms to determine whether a match can be found. Repeated machine-generated audio presented in telephone calls that support Integrated Voice Response (IVR) applications are identified and used to analyze the performance of IVR systems.

Abstract: A device for error correction and methods thereof are disclosed. The method includes retrieving raw data from a memory device during a first operational phase of the error correction device. The raw data is retrieved by a bus interface device that interfaces with a variety of memory devices. During a second operational phase, the raw data is outputted from the bus interface device to the bus master. In addition, error correction data is calculated, and error correction is performed on the raw data during the second operational phase. By retrieving the raw data before performing error correction, and by outputting the raw data and correction the raw data during the same operational phase, data may be retrieved from the memory more rapidly.

Abstract: The present invention is directed to a hydrophone streamer towable from a marine vessel on a body of water. The hydrophone streamer comprises a plurality of hydrophones electrically connected in parallel. Each hydrophone further comprises a normally-closed pressure activated switch connected in series with a hydrophone sensor. Each pressure switch is calibrated to open at a predetermined depth in the body of water thereby disabling the associated sensor without affecting operation of other hydrophones in the streamer.

Abstract: The present invention is directed to a hydrophone streamer towable from a marine vessel on a body of water. The hydrophone streamer comprises a plurality of hydrophones electrically connected in parallel. Each hydrophone further comprises a normally-closed pressure activated switch connected in series with a hydrophone sensor. Each pressure switch is calibrated to open at a predetermined depth in the body of water thereby disabling the associated sensor without affecting operation of other hydrophones in the streamer.