A wearable device comprising: a support structure; an audio module rotatably coupled to the support structure, the audio module comprising a parametric array of speakers configured to direct audio waves in a direction corresponding to a rotational orientation of the audio module relative to the support structure; and a processor configured to: with the parametric array of speakers, provide a first audio output; characterised in that the processor is further configured to: from an external device, receive information relating to detection of the first audio output; based on the information, determine a calibration factor while a user is wearing the wearable device, wherein the calibration factor is determined such as to optimize the audio output of the audio module to the ears of the user; based on the calibration factor, output a command, wherein the command includes an indicator to the user to adjust the rotational orientation of the audio module relative to the support structure, and/or the command includes a signal to an actuator to adjust the rotational orientation of the audio module relative to the support structure; and with the parametric array of speakers, provide a second audio output. a support structure; an audio module rotatably coupled to the support structure, the audio module comprising a parametric array of speakers configured to direct audio waves in a direction corresponding to a rotational orientation of the audio module relative to the support structure; and a processor configured to: with the parametric array of speakers, provide a first audio output; characterised in that the processor is further configured to: from an external device, receive information relating to detection of the first audio output; based on the information, determine a calibration factor while a user is wearing the wearable device, wherein the calibration factor is determined such as to optimize the audio output of the audio module to the ears of the user; based on the calibration factor, output a command, wherein the command includes an indicator to the user to adjust the rotational orientation of the audio module relative to the support structure, and/or the command includes a signal to an actuator to adjust the rotational orientation of the audio module relative to the support structure; and with the parametric array of speakers, provide a second audio output. with the parametric array of speakers, provide a first audio output; characterised in that the processor is further configured to: from an external device, receive information relating to detection of the first audio output; based on the information, determine a calibration factor while a user is wearing the wearable device, wherein the calibration factor is determined such as to optimize the audio output of the audio module to the ears of the user; based on the calibration factor, output a command, wherein the command includes an indicator to the user to adjust the rotational orientation of the audio module relative to the support structure, and/or the command includes a signal to an actuator to adjust the rotational orientation of the audio module relative to the support structure; and with the parametric array of speakers, provide a second audio output. from an external device, receive information relating to detection of the first audio output; based on the information, determine a calibration factor while a user is wearing the wearable device, wherein the calibration factor is determined such as to optimize the audio output of the audio module to the ears of the user; based on the calibration factor, output a command, wherein the command includes an indicator to the user to adjust the rotational orientation of the audio module relative to the support structure, and/or the command includes a signal to an actuator to adjust the rotational orientation of the audio module relative to the support structure; and with the parametric array of speakers, provide a second audio output.