多声道技术已由同一水平面布置音箱外，现在发展至上，中，下 三个层面上布置音箱，height channels 就是由这技术而引进的一概念。先看一下height channels wiki 说怎么说的.
Height channels are audio channels in surround sound multichannel audio. Height channels are located above the listening area and increase the sound field beyond the horizontal plane.
Two systems that use height channels, Dolby Pro Logic IIz and DTS Neo:X, which matrixes a front left and front right height out of the front left and front right channels. According to Dolby, non-directional ambient effects such as rain and wind are mapped to the height channels. This is similar to what is mapped to rear surround channels.
DTS-HD is a format which supports virtually any amount (over 2000) discrete channels for which a demonstration of an 11.2 system using four height channels was given at a Consumer Electronics Show.
Tomlinson Holman's 10.2 surround sound, a format currently under development, uses 12 or 14 fully discrete channels, both including two height channels; front left and front right.
为了形像说明这个问题，我以NHK Ultra HDTV(UHDTV) --- The 22.2 Multichannle Audio Format 的三层立体音箱布置图来说明.
红色层面上的音箱通道都是所谓的height channels.
