Abstract: An audio transmitter is disclosed that comprises at least one microphone configured to receive ambient audio and produce an ambient audio signal indicative of the received ambient audio, a pairing component arranged to facilitate pairing of the audio transmitter with a wireless audio reproducing device, and an audio transmission component arranged to wirelessly transmit a short-range audio signal to a paired wireless audio reproducing device. The short-range audio signal is usable by the wireless audio reproducing device to reproduce audio representative of the received ambient audio.

Abstract: An ear tip has an inner part connectable to an ear bud body of an earbud, and an outer part disposed at least partially over the inner part. The outer part is flexible and is for coupling the ear tip to a user's ear canal. The inner part includes an inwardly facing wall and an outwardly facing wall, the inner wall defining at least part of a primary sound communication path between the ear canal and the ear bud body. The inner part includes at least one tip vent that defines an ambient sound communication path between the inwardly facing wall and the outwardly facing wall, and thereby the user's ear canal and ambient. The inner part provides an acoustic impedance to sound passing through the at least one tip vent and thereby defined sound characteristics in the ambient audio communication path. An ear bud is also described.

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.