ลำโพง, เพลง, ผู้พูด, เสียง, สัญญาณรบกวน, ปริมาณ, เครื่องขยายเสียง, ดัง, สตูดิโอ, เสียงทุ้ม, อุปกรณ์
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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