Root Wireless, Inc.

Other

John Jarvis

Ludwig W Sepmeyer

A mobile device is arranged to perform an adaptive speed data collection method. A host application running on the mobile device cooperates with a background service also running on the mobile device. The background service is arranged as a state machine. On each pass through the state machine, quality of service (QoS) data associated with a particular wide area network, such as a cellular network, is collected. Also on each pass through the state machine, a sample time value is calculated based on a plurality of asserted triggers and rules applied to the asserted triggers. An alarm is loaded with the sample time value, and the background service is suspended until the alarm expires or an interrupt is asserted. The asserted interrupt begins a new sequential pass through the state machine.

Adaptive speed data collection

A system for measuring the quality of a wireless communications network includes a measurement module coupled to a mobile device, such as a cell phone. The mobile device is provisioned for typical use on the wireless communications network. The measurement module receives measurement data from the mobile device over a first interface. The measurement module organizes the measurement data into a second format and transmits that data back to the mobile device over a second interface. The measurement module includes a real-time clock so that the data is transmitted back to the mobile device in order to be joined with other measurement data concurrently gathered by the mobile device.

Measurement module

Noisemasking speakers are positioned in an array to direct noise into a space which is to be used by a number of people so that individual privacy is assured. The array is divided into four or more sets of speakers. The single noise source is equalized, and the same equalized noise is fed to the four speaker sets through time-delay devices so that the noise from each set has low correlation with each of the other sets.

Background noisemasking system

Masking-noise speakers are positioned in an array of lines and rows to direct masking noise into a space. Two separate noise generators provide noise signals respectively to two equalizer-amplifiers which provide their signals respectively to first and second narrow band equalizers. These channel signals are respectively delivered through power amplifiers to first and second sets of speakers in the speaker array. The first and second channel signals are combined to produce a third channel signal, are power amplified, and delivered to a third set of speakers in the array so that no two adjacent speakers on any line or row are powered by the same noise signal. In a modified arrangement, the combination of the first and second channel signals is made after power amplification.

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Newcastle, WA, United States of America

John Jarvis