Abstract: A cooling structure in a cylinder head of a water-cooled multicylinder engine has partitions disposed between cylinders and in a water jacket defined in the cylinder head, cooling inlet ports disposed on one side of plug insertion tubes extending vertically and disposed above substantially central portions of the cylinders and a cooling water discharge port disposed on the other side of the plug insertion tubes, and walls projecting from the partitions toward the plug insertion tubes. Each of the walls includes a lower projecting portion having a relatively small width near a wall of the cylinder head above a combustion chamber defined in each of the cylinders and an upper projecting portion having a relatively large width.

Abstract: A speech processor having microprocessor control of the amplitude level of input speech signals. Input speech signals are applied to a digitally controlled level regulator, the output of which is converted into a digital speech signal for further speech processing. The peak level of the digital speech signals over a frame period is compared in the microprocessor with a preset optimum range. If the peak level falls outside the optimum range, control signals for the level regulator are adjusted in a direction to change the amplification/attenuation amount of the level regulator to bring the peak level within the optimum range.