US Patent 11336991 Loudspeaker apparatus

A loudspeaker apparatus may include a circuit housing accommodating a control circuit or a battery; an ear hook and a rear hook connected to both ends of the circuit housing, respectively. The ear hook may be at least partially covered by a first protective housing. The rear hook may be at least partially covered by a second protective housing. The first protective housing and the second protective housing at least partially cover a periphery of the circuit housing from both ends of the circuit housing in a sleeve manner, respectively. The loudspeaker apparatus can avoid damage to the control circuit or the battery caused by high temperature.