Before revision: Researchers who specialize in human–computer interaction have recognized that both men and women tend to characterize female voices as more helpful.
After revision: For example, BMW was forced to recall a female-voiced navigation system on its 5 Series cars in the late 1990s after being flooded with calls from German men who reportedly "refused to take directions from a URLResearchers who specialize in human–computer interaction have recognized that both men and women tend to characterize female voices as more helpful.