Abstract: An audio system has a speaker port defining a speaker port cavity, which has a speaker port outlet communicating acoustically with a user's ear canal. A speaker generates output sound in the speaker port cavity based on a speaker signal received at the speaker. The output sound travels along an acoustic path extending from the speaker through the speaker port outlet to an ear canal. A speaker port microphone in acoustic communication with the speaker port cavity produces a speaker port microphone signal in response to input sound. An analysis unit receives the speaker signal and the speaker port microphone signal, uses the speaker signal and the speaker port microphone signal to determine a change in acoustic properties of the acoustic path, and uses the determined change in acoustic properties of the acoustic path to determine a change in physical properties of the audio system along the acoustic path.

Abstract: An audio transmitter including an audio input interface receiving first audio signals indicative of input audio from an audio source, a wireless transmitter wirelessly streaming second audio signals indicative of the input audio to a first audio reproducing device, and an audio output interface connectable to a second audio reproducing device, the audio transmitter arranged to supply third audio signals indicative of the input audio to the audio output interface. The audio transmitter facilitates connection to the audio transmitter to control wireless streaming of the second audio signals. A characteristic of sound of the wirelessly streamed second audio signals is controllable independently of a characteristic of sound of the third audio signals. An initial connection is established between the audio transmitter and a computing device in response to detection that the location of the computing device relative to the audio transmitter is less than a defined threshold.

Abstract: An audio transmitter including an audio input interface receiving first audio signals indicative of input audio from an audio source, a wireless transmitter wirelessly streaming second audio signals indicative of the input audio to a first audio reproducing device, and an audio output interface connectable to a second audio reproducing device, the audio transmitter arranged to supply third audio signals indicative of the input audio to the audio output interface. The audio transmitter facilitates connection to the audio transmitter to control wireless streaming of the second audio signals. A characteristic of sound of the wirelessly streamed second audio signals is controllable independently of a characteristic of sound of the third audio signals. An initial connection is established between the audio transmitter and a computing device in response to detection that the location of the computing device relative to the audio transmitter is less than a defined threshold.

Abstract: An audio transmitter including an audio input interface receiving first audio signals indicative of input audio from an audio source, a wireless transmitter wirelessly streaming second audio signals indicative of the input audio to a first audio reproducing device, and an audio output interface connectable to a second audio reproducing device, the audio transmitter arranged to supply third audio signals indicative of the input audio to the audio output interface. The audio transmitter facilitates connection to the audio transmitter to control wireless streaming of the second audio signals. A characteristic of sound of the wirelessly streamed second audio signals is controllable independently of a characteristic of sound of the third audio signals. An initial connection is established between the audio transmitter and a computing device in response to detection that the location of the computing device relative to the audio transmitter is less than a defined threshold.

Abstract: A method of measuring signal change including performing at least one calculation or iteration step based on one or more chaos non-linear dynamical functions on first and second input signals, or sample of signals, to produce iteration values. Performing at least a second iteration step by repeating the at least one calculation or iteration step based on one or more non-linear dynamical functions on the first iteration values to produce a second iteration values and subtracting one set of iteration values generated from either the first or second input signal from the corresponding iteration values generated from the other input signal.

Abstract: A method of measuring signal change including performing at least one calculation or iteration step based on one or more chaos non-linear dynamical functions on first and second input signals, or sample of signals, to produce iteration values. Performing at least a second iteration step by repeating the at least one calculation or iteration step based on one or more non-linear dynamical functions on the first iteration values to produce a second iteration values and subtracting one set of iteration values generated from either the first or second input signal from the corresponding iteration values generated from the other input signal.