IEC 63296-3:2025 Specifies the method for measuring the battery duration at a defined sound
pressure level for continuous music playback of battery-operated wearable powered
loudspeaker equipment. A primary battery or secondary battery can be used as a power source
for such a shoulder-carried or body-worn loudspeaker and its composite device. In addition,
only equipment that can be placed on or hung from a head and torso simulator (HATS) is
covered. Bone conduction speakers are excluded. Portable loudspeaker equipment also
supporting video playback as the main function is not covered by this document.

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