From the moment the Amazon speaker (Echo) was born, voice interaction has gradually entered people's field of vision, and more and more people have begun to bulk sms send come into contact with voice interaction devices. From the robot in the TV, to the speakers at home, and finally to the mobile phone in hand, voice interaction has become within reach. The first step in voice interaction is to pick up sound. The robot must first have an ear, because there will be no feedback if it cannot hear the sound, let alone interaction, and the microphone array is equivalent to the ear of the bulk sms send robot. What is a microphone array? I believe everyone has seen the microphone. It is our common microphone. The microphone array is essentially the same as the microphone, but there are more units for radio.
Basically, if there are more than two radio holes, it can be said to bulk sms send be a microphone array. It is simply understood that a microphone is a microphone, and multiple microphones are a microphone array. And the spatial characteristics of the sound field are sampled and filtered. In addition to the number of microphones seen, the bulk sms send microphone array also has a series of front-end algorithms, and the combined system is a complete microphone array. The microphone array only completes the audio signal processing in the physical world. To complete the speech recognition, the ASR model in the cloud is still required.
The two systems work together to bulk sms send obtain the best recognition effect. 2. How to classify microphone arrays? Since the front-end algorithm cannot be seen or touched, we often refer to the layout and number of microphones for the classification of microphone arrays. Of course, there are also classifications based on shapes, such as: a word, a cross, a plane, a spiral, a sphere, and a random array. Here we introduce it according to the bulk sms send method of point, line and surface. 1. Linear array The common one is a linear array composed of two microphones. At present, almost all mid-to-high-end mobile phones and headphones use dual-microphone noise reduction technology to improve the call effect, and some smart speakers also use this solution.