Intermittent condition Intermittent Cycles and Duty Ratios of Reverse Warning Devices Currently, products based on the following standards are on the Japanese market. Based on this data, we propose prescribing the number of intermittent cycles of reverse warning sound as follows: Number of intermittent cycles: Standard Number of intermittent cycles JASO D901 60 to 120 cycles/min. SAE J944 48 to 108 cycles/min. Prescribed value: 48 to 120 cycles/min. Duty ratios: Duty ratio: On duty 10 to 60% On duty: 10 to 60% Number of intermittent cycles: 48 to 120 cycles/min. OFF ON Intermittent condition

Number of intermittent cycles: 48 to 120 cycles/min. Sound samples of intermittent cycles: On duty: 10 to 60% Number of intermittent cycles: 48 to 120 cycles/min. OFF ON On duty 48 cycles/min. 85 cycles/min. 120 cycles/min. 10% 50% 60%