Abstract: Aspects of the present disclosure provide methods, apparatuses, and systems for non-linear breathing entrainment. As described herein, “breathing entrainment” refers to guiding a user's breath or breathing. According to an aspect, an initial breathing period and a final breathing period are selected. Based on the initial and final breathing periods, a non-linear breath rate per minute sequence is determined. A guiding stimulus is output and aligned with the non-linear breath rate per minute sequence. The guiding stimulus is non-linearly altered with the non-linear breath rate per minute sequence to align with the final breathing period over an interval of time. The non-linear alterations of the guiding stimulus vary based on an amount of time the guiding stimulus has been output.

Abstract: A headphone system includes headphones including a right-side earpiece including a right-side audio driver and a left-side earpiece including a left-side audio driver. The headphone system further includes a sensor to provide a sensor signal indicative of one of an aspect of movement of a user wearing the headphones or a value of a physiological parameter of the user; a controller configured to output an audio signal via the headphones, and a detection circuit configured to receive the sensor signal and to provide feedback based on the one of the aspect of movement of the user or the value of the physiological parameter, the feedback including a location of a source of the audio signal perceived by the user.