System and method for adjusting the audio volume of a charging case

Abstract

A charging case for a pair of wireless earphones, the charging case comprising: a housing having a peripheral wall that defines a shell and one or more audio openings formed through the peripheral wall; a frame insert coupled to the housing and extending into the shell, the frame insert having one or more insert walls that define first and second pockets sized and shaped to accept first and second wireless earphones, respectively; wherein the one or more insert walls cooperate with the housing peripheral wall to define a interior cavity within the charging case; a lid coupled to the housing and operable between a closed position in which the lid covers the first and second pockets and an open position in which the first and second pockets are exposed; a rechargeable battery disposed within the interior cavity; a speaker disposed within the interior cavity and aligned to emit sound through the one or more openings; and circuitry coupled to the battery and the speaker and configured to: initiate playing an audio asset on the speaker at a first gain level; while continuing to play the audio asset, increasing the gain level of the speaker from the first gain level to a final gain level by repeating a sequence of measuring a system load on the battery and increasing the gain level of the speaker until the measured system load reaches a threshold level; after the measured system load reaches the threshold level, setting the gain level of the speaker at the final gain level and continuing playing the audio asset with the gain set at the final gain level.