Micro speaker with directional transaudient function

Abstract

The invention discloses a micro speaker with directional transaudient function, belonging to the speaker field, which comprises a plurality of transducer units in the form of array. The speaker comprises the following working steps: audio signal is amplified by a broadband power amplifier and input into a micro transducer, and the transducer generates audible sound which has the same working principle as the traditional audio tweeter; the audio signal is loaded into ultrasonic signal generated by a digital signal processing system; the modulated signal is amplified by the broadband power amplifier and input into the micro transducer; the transducer transmits the signal in air; due to air nonlinear interaction, the signal generates audible sound with high directivity by self-modulating. The speaker is applicable to the occasion with traditional audio function separately or directional transaudient function or both.

Description

technical field [0001] The utility model relates to a miniature loudspeaker with the function of directional sound transmission, which belongs to the field of loudspeakers. Background technique [0002] At present, traditional audio speakers directly amplify the audio signal and load it on the paper cone or diaphragm, and the audio electric energy makes the paper cone or diaphragm vibrate the surrounding air through electromagnetic, piezoelectric or electrostatic effects to produce sound. Its sound field radiates in all directions of the space, and its directivity is poor. Although the directivity can be improved by increasing the vibration frequency of the paper cone or diaphragm, it is also very limited in the audio range. Therefore, it is difficult for conventional audio speakers to guarantee good privacy. [0003] Portable multimedia devices such as mobile phones and MP4s have more and more functions, such as listening to music, watching movies, playing games, and openi...

AI Technical Summary

Problems solved by technology

[0002] At present, the traditional audio speaker directly amplifies the audio signal and loads it on the paper cone or diaphragm, and the audio power passes through electromagnetic, piezoelectric or electrostatic effects to make the paper cone or diaphragm vibrate the surrounding air to cause sound.

Its sound field radiates in all directions of the space, and its directivity is poor. Although the directivity can be improved by increasing the vibration frequency of the paper cone or diaphragm, it is also very limited in the audio range.

Therefore, traditional audio speakers are difficult to guarantee good privacy

Images