1. 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

2. 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%