Directional sound, as the name implies, means that the sound no longer spreads 360 degrees like a traditional speaker, but has a direction that transmits sound along a certain path.
There are three main types of directional sound technology:
(1) The sound-absorbing cover technology, the simplest of which is to cover a large hemispherical cover on the high-frequency speaker, and the sound can be clearly heard under the sound-absorbing cover;
(2) It is a speaker array technology, which uses a large number of high-frequency horns to form an array to form a beam, and the beam direction is the highest energy in the direction of the main lobe;
(3) It is an audio-based directional propagation technology based on ultrasound. This method is to modulate the sound to the ultrasonic transmission. After hitting the interface, it uses the self-demodulation in the air to generate sound. This technique is reliable and effective. The third technology to achieve directional sound largely fills the gap in the field of acoustic innovation at home and abroad.
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