| 摘要 |
A loudspeaker comprises a speaker diaphragm 15.1, 22.1, a speaker housing 15.3, 22.2 and a pass-through or port 15.4, 22.6. Improved audio output characteristics are obtained by employing acoustic members 15.7, 15.8, 22.3, 22.4 that include a substantially flattened body portion and a valve within the body within the pass-through or port. The valve is configured to open to allow at least some sound waves to move through the pass-through or port when in use.The valve may comprise cuts or incisions in the acoustic member (13.2, 23.2, figs 13 and 23). |
