Ch. 4 · 第１節 運転に当たつての注意
A driver whose hearing in both ears is impaired to the extent that they cannot hear an 80-decibel warning horn at a distance of 10 meters, even with a hearing aid, must display a hearing impairment mark.
[True / False · Hard]
Answer: False
Explanation
The Rules of the Road, Chapter 4, Section 1, 1(1)F clearly states "90 decibels." The "80 decibels" in the question is incorrect; the correct value is "90 decibels." This is a trick question that requires accurate recall of the numerical value.
Source: Ch. 4 · Section (第１節 運転に当たつての注意) · 1(1)カ 両耳の聴力が補聴器を用いても10メートルの距離で90デシベルの警音器の音が聞こえない程度の聴覚障害のあることを理由に免許に条件を付されている運転者
See the glossary for definitions of key terms.