Randomized trial investigates how turn signal sounds affect drivers' feelings of caution, rush, and drowsiness, suggesting design improvements for safety.
Key Points
This study aims to understand how different acoustic features of turn signal sounds affect drivers' feelings of caution, rushedness, and drowsiness.
Conducted a subjective listening experiment with 33 participants rating various turn signal sounds.
Modified typical turn signal sounds by changing BPM and pitch to create acoustic variations.
Participants used 5-point scales to assess impressions such as caution, feeling rushed, and drowsiness.
Turn signal sounds with original BPM and pitch were rated as more pleasant and suitable.
Increased BPM and pitch correlated with higher feelings of caution and being rushed.
Lower BPM and pitch led to higher ratings of drowsiness.