Patent ID: 9197180
Filing Date: 2015-11-24
Classification: H03G

Abstract:
1. An audio unit mountable in a personal watercraft, comprising: a speaker; an automated adjustment device connected to the speaker for obtaining an automated sound volume value corresponding directly to an engine speed or a watercraft speed, the automated sound volume value being automatically adjusted based on a change in the engine speed or the watercraft speed, and automatically adjusting a volume of a sound emitted from the speaker based on the automated sound volume value; and a sound volume manipulation member configured to be manipulated by a rider to input a change amount of the sound volume with respect to the automated sound volume value, wherein the automated adjustment device is configured to adjust the volume of the sound emitted from the speaker such that the volume of the sound is changed from the obtained automated sound value by the change amount of the sound volume, in response to the rider's manual manipulation of the sound volume manipulation member, when a predetermined manipulation permission condition is satisfied, and wherein when the engine speed or the watercraft speed satisfies a predetermined deceleration condition, the automated adjustment device cancels a sound volume increase amount with respect to the automated sound volume value which was caused by the rider's manual manipulation of the sound volume manipulation member before the predetermined deceleration condition is satisfied and adjusts the volume of the sound emitted from the speaker such that the volume of the sound becomes the automated sound volume value.