Measurement And Analysis Of Distance Perception Sensitivity Of 3D Audio

Presently the research on 3 d vision technology has made remarkable achievements,on the market at present the relevant film companies are also beginning to use the relevant technology,3 d visual effects and a more realistic on-the-spot experience has attracted numerous audience,it is because of the rapid development of 3 d movie,people’s way of viewing and great changes have taken place.However,the development of 3D audio technology is still lagging behind that of 3D image technology.Whether in the theater or at home,most 3d multimedia systems use 3d video + stereo or surround sound design.3d audio technology refers to the voice of the refactoring has a horizontal plane at the same time,the vertical plane and the distance of three degrees of freedom,and the general sound of the stereo or surround sound system reconstruction of the free,but only with a horizontal plane may make it harder for users to gain immersive experience,so 3 d audio technology research and development is a new research hotspot in the field of multimedia in recent years.At present,there are two common sound field reconstruction technologies in the market,one is physical sound field reconstruction using microphone array acquisition technology,the other is virtual sound field reconstruction technology using human auditory system perception characteristics.Compared with the previous physical sound field reconstruction technology,the virtual sound field reconstruction technology based on auditory perception has greatly reduced the requirements of sound playback conditions and equipment.Among them,the amplitude translation technology and binaural reconstruction technology based on head correlation transfer function are widely used.With the continuous development of virtual sound field technology,the demand for sensing characteristics of auditory system is also greatly increased,so it is very necessary to conduct relevant research on 3d audio distance sensing characteristics.In this paper,we design some experiments on the sensitivity of 3d audio distance perception.The perception of 3 d audio related degrees of related research is mainly aimed at centered on people’s head in front of 360 degrees and 180 degrees of the head up and down around the direction of the related experiment data of measurements in direction,in view of the auditory system to the perception of the distance related research slightly less,relevant experiment mainly through different locations in the quieter room sound collection,The tester uses headphones to conduct audiometry experiments,and finally gets the perceptual characteristics of THREE-DIMENSIONAL audio.Although this experimental environment can satisfy the measurement of different azimuth perception characteristics,the distance perception is weakened due to the influence of head-in-head effect.Therefore,based on the traditional experiment of three-dimensional audio perception characteristics,this paper designs an experiment of three-dimensional audio distance perception sensitivity by fully considering the influence of other factors on distance perception sensitivity.This experiment is arranged in a listening room with a reverberation time of 0.4s.A support can be designed to move up and down,back and forth.During the test process,the distance from the sound source to the human ear can be controlled by moving the front and back positions of the sound.The tester needs to perform on-site listening.Through the analysis of the experimental data,the change of 3d audio distance perception sensitivity was firstly obtained,and compared with the conclusion of the paper using the traditional method,it was found that the overall change trend of 3D audio distance perception sensitivity obtained by the two methods was basically the same.Secondly,the main factors affecting distance perception sensitivity of 3D audio are further studied,and distance is the main factor affecting distance perception sensitivity.Finally,statistical analysis of the experimental data shows that the distance perception threshold at 1m is 7.62 cm,and the distance perception threshold at 2m is 15.76 cm.The experimental results have certain reference value for efficient 3d audio coding and sound field reconstruction.