Computer Simulation And Virtual Design Of Circumaural Headphone

With the rapid development of portable devices and communication networks,headphone has become an indispensable tool in life,not only can be used to listen to music,infotainment,but also is extremely important equipment to communication.With this large market growth has come a resurgence in headphone research and development,much of it focused on how to best optimize headphone sound quality for different applications,and also more and more technologies such as wireless technology,active noise reduction technology,etc.,which are applied to various types of headphones.But there is still lack of fundamental and systematic theoretical basis for headphones infrastructure research,and yet there are few discussions in open literature,which make headphone designers always rely on experience to make continuous attempts to redesign headphones,cost more materials and longer research period.Therefore,this paper focused on the closed circumaural-headphones,using the well-known electro-acoustic analogy method,combining theory and simulation analysis to investigate the impact of the main components of the headset on the output frequency response curve.And finally design the user interface and try to obtain a simple and straightforward method to obtain the corresponding laws between the frequency response curve and each component of the headphones,which can provide guidance on the frequency response design of the headphones.Firstly,the corresponding relationship between the various components of the headphone and the output frequency response characteristics have been analyzed and summarized through the force-electroacoustic-audio analogy method in this paper,and it emphatically analyzes the influence law of the quality factor(acoustic outlet and rear vent holes)on the frequency response curve.The results show that the quality factor is mainly reflected in the position and size of the high-frequency resonant peak,and the smaller the impedance,the curve becomes more stable in high frequency.Then,the whole headphone system is simulated with the aid of PSPICE,the well-known electrical circuit simulator.Other factors such as cavity,diaphragm compliance,and vibration system quality etc.,also have been explored,and the law of influence on the response curve of each component was obtained with it.What's more,in order to verify the laws that explored and summarized before,the objective measurement(measurement frequency response curve)and subjective evaluation(psychoacoustic experiment)method are used in this section,the acoustic outlet holes of the headphone have been modified,and the measurement and evaluation indicate that when the impedance of the hole changes,the influence of the frequency response curve for the current headphone system is reflected in the effect on the high frequency resonant peak,that is,when the impedance of the hole is increased by 2 times,the high-frequency resonant peak attenuates by 13 dB,which also shows that changing the frequency response curve of the earphone will affect its sound quality.Finally,the corresponding relationship between the individual components and the frequency response characteristics of the headphone system obtained in the theoretical analysis is used as a calculation model of the headphone frequency response curve,and a simple and flexible user interface is designed using an object-oriented programming method.At present,a simple calculation interface with 8 impact factors was tested and related tests were performed to verify its feasibility.