What is a directional speaker?

What is a directional speaker? In a nutshell, the directional speaker is an audio device that allows you to listen to audio while those around you cannot hear what you are hearing. In the following paragraphs we will tell you more about the directional speaker and the technology it uses, and we will list a few industries where it is widely employed.
Product Paramenters
GENERAL SPECIFICATION
OPERATE VOLATGE
DC12V ~ DC24V     5.5/2.1mm CONNECTOR
OPERATE CURRENT
1A
MAXIMUM TRANSMITTING RANGE
>20 METERS
MAXIMUM AUDIO INPUT VOLATGE
<1 Vp-p
DS100A INPUT TERM
3.5mm AUX WIRE INPUT
DS100B INPUT TERM
WIRELESS 
TRANSDUCER FREQUENCY
40kHz
SPEAKER SIZE
10cm X 10cm X 2.5cm
Details Images
Products Description
What sound control technologies do we use?
DS100 specialize in the manufacturing of directional speakers, also commonly known as parametric
speakers, which function to emit a narrow beam of sound towards a targeted area and just steps
away no sound can be heard.In order to create these unique speakers, the DS100 team of engineers
utilize innovative adaptive sound control technologies, namely parametric array, a nonlinear transd
uction mechanism. A parametric array does not generate sound directly – it uses ultrasonic waves
to reproduce sound. Ultrasonic waves modulated with an audio signal are generated by ultrasonic
transducers. As they pass through air or encounter objects, they de-modulate and sound can be
heard.Diffffraction of ultrasonic waves is much lower than sound waves because of their higher freq
uency. So, the ultrasonic waves, and the sound coming from the directional speaker, spread very
little and are confifined to a narrow beam that can reach tens of meters.
Dimension