Tue, Mar

  • Smaller Small Medium Big Bigger
  • Default Helvetica Segoe Georgia Times
Sound technology can be used for psychological harassment or criminal psychological harassment.
- European stores were in the news papers not that long ago for using high frequency sounds for psychological harassment.
- Sharp and piercing beeps can, like flashing lights, be annoying or have more of an effect on someone who is sleep deprived or has high levels of cortisol.