TV and the air conditioner and talk to the speaker, the speaker will use the wake-up angle as the pickup area to suppress noises that are not at that angle (TV sound and air conditioner noise). Generally, we set the pickup angle according to the usage scene. The executive email list farther the distance is, the smaller the angle, usually between 60°-120°. Noise suppression can meet daily home use scenarios, but it is not ideal for strong noise environments, typically cocktail executive email list sound. 3. Echo Cancellation If no special treatment is done, the robot will recognize the sound it makes, and it is very likely that it will become endless self-questioning, or pick up the wrong executive email list sound. Echo cancellation is to solve this problem, to eliminate the sound of the machine itself. For example, in the home scene, your speaker is playing
Jay Chou's new song, but you want to check the weather, at this time you will say "Xiao X, today's weather". The purpose of echo cancellation is to remove the music information and preserve your voice. In fact, echo cancellation may not be easy to understand executive email list. It is sometimes called "self-recognition", that is, it recognizes the sound it makes by itself. 4. Reverberation cancellation In some scenes, there will be echoes of pronunciation, and people executive email list can hear the echoes returned at a distance of about 17 meters. However, the perception of machines is much more sensitive than that of humans. If no processing is done, there will be a situation where a sentence is superimposed and recognized.
Reverberation often refers to the phenomenon in which sound waves are reflected by obstacles such as walls, ceilings, and floors when propagating indoors, and executive email list superimposed with direct sound. For example, in a studio, we can feel more obvious echoes, and machines can also recognize these echoes. Reverberation elimination is to eliminate the echo executive email list brought by, and only identify the content of the first pass. By solving these problems, it is basically possible to carry out a normal pickup in a daily environment, so as to ensure the normality of the entire speech recognition. 4. How to choose a microphone array? There are many optional microphone array solutions on the market.