A method and system for improving indoor speech clarity

Abstract

The invention discloses a method for improving indoor speech clarity, which includes: obtaining the geometric dimensions of indoor buildings, and establishing an indoor simulation model according to the geometric dimensions; selecting several parameter evaluation points in the indoor simulation model, and according to the preset The clarity evaluation parameter calculation strategy selects several weak points of clarity among the parameter evaluation points; the weak points of clarity are used as reference positions for arranging diffusers and reflective materials indoors; the weak points of clarity are calculated The average reverberation time under the selected octave frequency band; calculate the sound absorption increment corresponding to the octave frequency band according to the preset target reverberation time of the octave frequency band and the average reverberation time; A sound-absorbing material is selected according to the sound-absorbing increment; the sound-absorbing material is arranged at a first preset position indoors. The invention also discloses a system for improving indoor language clarity. By adopting the embodiment of the present invention, the speech clarity indoors can be effectively improved.

Description

technical field [0001] The invention relates to the technical fields of architectural acoustics and signal processing, in particular to a method and system for improving indoor speech clarity. Background technique [0002] The classroom is the main place for school teaching, and many classrooms have language intelligibility problems, especially in the middle and rear seats and large classrooms. The language intelligibility of the classroom will affect the quality of students' class. Low language intelligibility will lead to problems such as distraction and poor learning effect of students because they cannot hear the teacher's lecture clearly. The low language clarity in the classroom will make the teacher involuntarily increase the volume of lectures, which is easy to get tired and unfavorable to the health of the throat. The speech intelligibility of the classroom is mainly related to the sound pressure level of the sound source (such as the teacher lecturing), the distan...

AI Technical Summary

Problems solved by technology

However, in our country, there is basically no special design for improving classroom language clarity in school construction, and the relevant school management departments do not understand the factors that affect classroom language clarity. They think that this problem can be solved as long as they are equipped with microphones and speakers. It was found that this is not the case. While amplifying the volume of the teacher's lecture, the sound reinforcement equipment in the classroom will also amplify the background noise and reverberation sound. The sound energy ratio has not changed, so it cannot improve language clarity.

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