| 摘要 |
<p>A contoured horn/wave guide controlling directivity, and increasing power handling capacity and sound pressure level (SPL) of a small diaphragm, direct radiating, dome high frequency speaker (77). The contour of the horn/wave guide combines three different flare rates, each of which extends approximately one-third of the length from a throat of the horn to its mouth. The first third disposed adjacent to the throat of the speaker is a conical contour (30). The second third of the horn length follows an exponential flare contour (34) to provide resistive loading. The final third of the horn length employs a modified tractrix contour (38) that prevents mid-band beaming and provides uniform pattern control of the sound waves emanating from the speaker. An integral trim ring (80) that mounts the guide/horn to loudspeaker enclosure is also included. The integral trim ring includes a pair of joined rings (82, 84) adapted to surround the wave guide and an adjacent low frequency speaker also mounted within the same speaker enclosure as the dome high frequency speaker.</p> |
