Research On Acoustic Design Of Home Theater

In recent years,with the improvement of people’s material and spiritual living standards,people have more demand for performances.In order to experience the audio-visual atmosphere of concert halls,cinemas,theaters and other places in the home environment,a home theater is arranged in the residence.These home theaters are small in size,have a wide variety of body shapes,have different functional requirements,and are complex and diverse materials,so the design is complicated and lacks a unified design standard.The main functions of home theater are music,movies,dramas,and learning meetings.The listening environment is affected by sound quality evaluation parameters such as reverberation time,speech intelligibility,clarity,sound pressure level,signal-to-noise ratio,and sense of reverberation.In the acoustic design of home theaters,in order to obtain a good audio-visual experience,the shape of the hall should be adjusted appropriately,sound-absorbing materials and diffusers should be reasonably arranged,and noise control measures should be appropriately adopted.At present,most home theaters have poor shape of the hall,inappropriate reverberation time,unreasonable material selection and layout,and insufficient sound insulation measures.Many home theaters blindly rely on electro-acoustic equipment and only arrange sound-absorbing materials based on aesthetics.,So that the sound quality evaluation parameter range is unreasonable and the sound quality is poor.Most home theaters are arranged in residences,and sound insulation measures are particularly important.It is necessary to ensure low background noise and reduce interference to surrounding residents.This paper takes home theater sound quality evaluation parameters and their influencing factors as the research object,summarizes the recommended range of home theater objective sound quality evaluation parameters,analyzes the relationship between subjective sound quality evaluation and objective sound quality evaluation parameters,and the effect of influencing factors on sound quality evaluation parameters;basis Relevant conclusions on the sound quality evaluation parameters.Investigate several built home theaters with different sizes,volumes and different main functions,and analyze the sound quality characteristics of the home theater based on the survey results;summarize the sound quality evaluation parameters based on the recommended range of the sound quality evaluation parameters and the sound quality characteristics of the home theater.Develop acoustic design methods for home theaters.This article studies the acoustic design method of home theater from the following aspects:(1)In terms of the body shape of the hall,it summarizes the choice of home theater location and body shape,analyzes its acoustic defects,and proposes body shape adjustment recommendations for its body shape;(2)According to the usage of different speakers in the home theater,the influence of the placement of the speakers and the audience on the sound quality of the home theater was analyzed,and the recommended placement of the speakers and the audience was put forward;(3)Based on research data related to reverberation time in small halls,analyze the results of case acoustic measurements,and summarize the recommended range of reverberation time and its frequency;(4)The acoustic and physical properties of the materials are introduced,the basis for the selection of materials are summarized,and the materials commonly used in home theaters are introduced.Through Odeon software simulation,the layout position of different functional hall materials was studied;the layout of sound-absorbing materials and diffusers was introduced,and the suggested layout of materials was obtained through Odeon soft simulation analysis.(5)Summarized the requirements for background noise in halls with different functions.The factors affecting the sound insulation of doors,windows,floors and walls are analyzed,and the sound insulation measures suitable for the residential environment are summarized.The influencing factors of air-conditioning noise are analyzed and the corresponding noise reduction measures are summarized.(6)Summarized the requirements of home theater electro-acoustic system.The condition setting requirements of software simulation are summarized,the acoustic problems reflected by different simulation results,and the corresponding adjustment methods are analyzed.From the above aspects,after obtaining the home theater acoustic design method,it is applied to the actual home theater acoustic design.The survey results of acoustic measurement and subjective evaluation show that the acoustic design method proposed in this paper is feasible.