The front-supporting surface of the front channel is lower than the back-supporting surface of the back channel.

The forward traffic channel data field value is associated with forward channel communications, and the reverse traffic channel data field value that is associated with reverse channel communications.

A steel ball (8) is arranged in the conical channel (5) so as to occlude said channel before expiration.

An input receives a sound signal including a left channel signal, a right channel signal, a front channel signal and optionally a rear channel signal.

When shifting from a communication channel to another channel, each wireless terminal device maintains the synchronized state established in the channel prior to the shift.

In some embodiments, the second channel estimate may be used to refine the first channel estimate before the selection of the final channel estimate.

The inlet (300, 496, 532, 734, 834) has a leading channel end, which is open to air flow from the leading slider edge (204, 452 and 502), channel side walls (304, 306, 498, 499, 538, 540) and a trailing channel end.

Another opening is provided between the front and the back channel, the said opening is arranged through which the articles located in the bottom of the channel are moved forward.

Then, the sound signal processing device adds the delayed surround channel signal to the front channel signal and outputs the added signal.

A swinging block is hinged to the bottom space, which is spaced between the front channel and the back channel.

The INR value is determined by the distance the blood traverses down the channel before it coagulates.

The first and second output signals are summed to provide a third output signal that is channel equalized for transmission over a channel.

A front channel signal is superposed on an output signal of the second processing unit.

When the channel information has been updated, an updated transmission weight is calculated on the basis of the pre-update channel information and the post-update channel information.

Equipment incorporating such a protocol listens to the channel before transmitting.