horn throat造句

• The phase plug can be considered a further narrowing of the horn throat, becoming an extension of the horn to the surface of the diaphragm.
• A horn throat from the 801 penetrated the center of the LF field coil and exited into a small multicellular horn mounted in front of the LF cone.
• Gunness recognized that relatively large 2-inch ( 51 mm ) horn throats, commonly used for greater SPL, produced an undesirable narrowing of the output pattern above 10 kHz.
• He discovered that only half of the compression driver's energy, at best, goes directly from the diaphragm through a phase plug slot or port and into the horn throat.
• This gives a pressure-to-volume velocity change ratio in the range of 8 : 1 to 10 : 1, which serves to match the impedance of the diaphragm to the horn throat.
• The diaphragm is generally shaped like an inverted dome and loads into a series of tapered channels in a central structure called a phase plug, which equalizes the path length between various areas of the diaphragm and the horn throat, preventing acoustic cancellations between different points on the diaphragm surface.