The safety of the parametric speaker has been studied in the field of technology. It has been found that there is no adverse effect of the parametric speaker, at least in the ultrasonic wave range of 40 kHz, on either physical or mental conditions (Lee et al., 2011, 2012).
How do parametric speakers work?
Parametric speakers are more like a laser beam with the sound focused at high intensity into a relatively small area. The result is that two people can be standing only a few feet apart from each other yet only one of them will hear the directional audio waves emanating from the parametric audio source.
What is parametric speaker?
A loudspeaker that people only hear when directly in front of it. Used for marketing or instructional purposes when someone walks by, parametric speakers use ultrasonic frequencies, which are extremely directional but are beyond human hearing.
What is a directional speaker?
In a nutshell, the directional speaker (aka audio laser) is an audio device that allows you to listen to audio while those around you cannot hear what you are hearing. The history of the directional speaker originates from science.
What is audio Spotlight technology?
The Audio Spotlight is a revolutionary new audio technology that creates sound in a narrow beam, just like light. Aim the flat, thin speaker panel to your desired listening area, and provide all of the sound and none of the noise.™
What is ultrasonic speaker?
Ultrasound has much shorter wavelengths than audible sound, so that it propagates in a much narrower beam than any normal loudspeaker system using audio frequencies. This effect cannot be achieved with conventional loudspeakers, because sound at audible frequencies cannot be focused into such a narrow beam.
What is a directive speaker?
In a nutshell, the directional speaker (aka audio laser) is an audio device that allows you to listen to audio while those around you cannot hear what you are hearing.
How do ultrasonic speakers work?
Ultrasonic speakers work by emitting a narrow high-frequency beam of sound. This sound is laser-focused to where the listener is, delivering a message that only they can hear. When you use an ultrasonic speaker, it’s as if you’re a little voice in their head.
Is bass sound directional?
Most audio people happily admit that bass is omni-directional in nature. They’re right, of course. A single, forward-firing subwoofer in free space will exhibit an omni-directional frequency response.
What are hypersonic speakers?
Hypersonic® sound (HSS®) is an audio technology that uses the interaction between ultrasonic waves and air to generate audible sound. Radically different from traditional speakers, HSS® devices generate sound indirectly so they don’t suffer from the many types of distortion found in other devices.
How does a parametric speaker work?
Ive seen parametric speakers like this for sale on some sites but I wanted to make on for my own. It works by taking an audio source, in this case a Bluetooth speaker circuit, which then gets modulated to 40khz through a 555 timer circuit. From the 555 timer the output gets amplified and then is then sent to an array of ultrasonic transducers.
What is a soundlazer speaker?
Most speakers are designed to throw sound as far and loud as possible. Soundlazer is a parametric speaker that is more like a laser beam with the sound focused at high intensity into a relatively small area.
Do parametric speakers deter robberies?
Patrons and store clerks that would normally be distracted by the same message repeating over and over on a daily basis will no longer be annoyed by advertising that uses parametric technology. Parametric speakers combined with high decibel sirens have been used to deter robberies and other criminal activities.
Did political candidates use Parametric arrays to beam live audio to public?
There are rumors surfacing on the web that some political candidates have used parametric arrays to beam live information directly into the ears of public speakers so that no earpiece or TelePrompTer is needed. While this hasn’t been confirmed, it does offer interesting possibilities.
