摘要: A casino gaming apparatus is disclosed which includes a controller programmed to generate an audio signal. The operatively linked ultrasonic processor. processor convert the signal received from into emitter emits along column of air in front apparatus. demodulated audible sounds by interaction with produce sound substantially confined within column. intersects position where player stands or sits. Accordingly, are generated area occupied and provide little no distractions for players using adjacent apparatuses.
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