Functionality: Uses ultrasonic audio waves to create a directional speaker.
Experience: Delivers a private listening zone similar to using headphones.
Mystery: Ability for a distant listener to hear while the microphone nearby does not.
Key Features of Ultrasonic Technology
Sound Directionality: Ultrasonic technology allows sound waves to focus more effectively than traditional speakers.
Comparison with Traditional Speakers:
Amplitude: Determines loudness.
Frequency: Determines pitch.
Traditional speakers allow sound to bend around corners due to long wavelength.
Ultrasonic Waves: Have shorter wavelengths, leading to a focused audio cone (about 15 degrees).
Experiment and Demonstration
Setup: The speaker was placed on a lazy Susan for demonstration.
User Experience: Listeners can hear sounds as if they are moving around them, creating a trippy experience.
Bouncing Sound: Sound can be aimed and made to appear as if it’s coming from different locations by bouncing off surfaces.
Limitations of Ultrasonic Technology
Attenuation: Ultrasonic waves do not weaken as quickly as audible waves; they can travel further with similar volume but can be blocked easily by objects.
Sensitive Hearing: High-frequency ultrasonic sounds can be uncomfortable for some individuals and animals.
Potential Applications
Target Audience: Primarily for commercial use, such as in museums, showrooms, and advertising.
Unique Uses: Integration in playgrounds or haunted houses for a unique auditory experience.
DIY Options: There are resources available online for individuals to create their own versions of ultrasonic speakers.
Conclusion
Cost Consideration: Current ultrasonic speakers may be expensive, but there are efforts to reduce costs for broader use.
Engagement: The technology offers innovative ways to enhance customer experiences in various settings.