Sound quality evaluation system and method and medium

Abstract

The invention provides a tone quality evaluation system, a tone quality evaluation method and a medium. The tone quality evaluation system comprises a control unit, a conveying unit and a plurality of samples to be tested, the control unit is used for determining a current evaluation sample from the plurality of to-be-tested samples based on the random evaluation sequence, and performing sound quality evaluation operation on the current evaluation sample; under the condition that a sample switching instruction is received, taking the next to-be-tested sample of the current evaluation sample as the current evaluation sample based on the random evaluation sequence, and returning to execute the tone quality evaluation operation; the tone quality evaluation operation comprises the steps of controlling the transmission unit to transmit the current evaluation sample to the evaluation point position, and controlling the current evaluation sample to play the evaluation audio after the transmission is completed. According to the tone quality evaluation system, the tone quality evaluation method and the medium provided by the invention, subjective prejudice of evaluation personnel caused by a sample sequence is effectively reduced through a random evaluation sequence. The evaluation efficiency is remarkably improved through automatic sample switching and conveying operation, and delay and personal errors caused by manual operation are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of audio testing, and in particular to a sound quality evaluation system, method and medium. Background Art

[0002] Sound quality evaluation is the process of subjectively or objectively evaluating the sound produced by audio equipment. It is widely used in the research and development and performance verification of headphones, speakers, smart speakers, etc. Its purpose is to judge the sound reproduction ability of audio equipment by evaluating multiple sound quality dimensions such as low frequency, clarity, and spatial sense, so as to ensure that the product meets the user's expectations for sound quality.

[0003] Most existing sound quality evaluation technologies rely on manual operations, including manually placing and switching the samples under test, adjusting the volume, and manually recording the evaluation results. Although this method can reflect the subjective perception of sound quality, it has significant shortcomings. First, there are errors in manually adjusting the volume, which makes it difficult to keep the volume consistent between different samples, affecting the accuracy of the evaluation results. Secondly, manual switching of samples takes a long time, which exceeds the length of time the evaluators remember the sound quality characteristics, which can easily lead to evaluation errors. In addition, manually recording evaluation scores is prone to confusion or errors, and the evaluation efficiency is low. These shortcomings make it difficult for existing sound quality evaluations to meet the needs of rapid iteration and high quality requirements of modern audio equipment in terms of accuracy and efficiency. Summary of the invention

[0004] The present invention provides a sound quality evaluation system, method and medium, which are used to solve the defects of low sound quality evaluation efficiency and large error in the related art.

[0005] The present invention provides a sound quality evaluation system, comprising a control unit, a transmission unit, and a plurality of samples to be tested; The control unit is used to determine the current evaluation sample from the multiple samples to be tested based on the random evaluation order, and perform a sound quality evaluation operation on the current evaluation sample; and when receiving a sample switching instruction, based on the random evaluation order, take the next sample to be tested of the current evaluation sample as the current evaluation sample, and return to perform the sound quality evaluation operation; The sound quality evaluation operation includes controlling the transmission unit to transmit the current evaluation sample to the evaluation point, and controlling the current evaluation sample to play the evaluation audio after the transmission is completed.

[0006] According to a sound quality evaluation system provided by the present invention, the transmission unit includes a height transmission subunit; The height transmission subunit is used to adjust the current evaluation sample to a target height, and the target height is determined based on the personnel information of the evaluation personnel.

[0007] A sound quality evaluation system according to the present invention further includes a driving unit, wherein the driving unit is used to drive the transmission unit to move under the control of the control unit; The transmission unit and the plurality of samples to be tested are arranged in a first space, the control unit and the driving unit are arranged in a second space, and the first space and the second space are isolated from each other.

[0008] A sound quality evaluation system provided according to the present invention further includes a first microphone; The control unit is also used to control the current evaluation sample to play the reference audio before controlling the current evaluation sample to play the evaluation audio, and at the same time control the first microphone to collect the sound pressure level of the reference audio, and adjust the volume of the current evaluation sample based on the sound pressure level.

[0009] According to a sound quality evaluation system provided by the present invention, the control unit is specifically configured to adjust the volume of the current evaluation sample based on the difference between the sound pressure level and the target sound pressure level.

[0010] A sound quality evaluation system provided by the present invention further includes a second microphone; The second microphone is used to collect voice data of the evaluator; The control unit is further configured to perform speech recognition on the speech data, and determine a sound quality evaluation result of the current evaluation sample based on a text obtained through speech recognition.

[0011] The present invention also provides a sound quality evaluation method, comprising the following steps: Based on the random evaluation order, determine the current evaluation sample from multiple samples to be tested, and perform a sound quality evaluation operation on the current evaluation sample, wherein the sound quality evaluation operation includes controlling a transmission unit to transmit the current evaluation sample to an evaluation point, and controlling the current evaluation sample to play the evaluation audio after the transmission is completed; When a sample switching instruction is received, the next sample to be tested of the current evaluation sample is used as the current evaluation sample based on the random evaluation order, and the sound quality evaluation operation is returned to be performed.

[0012] According to a sound quality evaluation method provided by the present invention, before controlling the current evaluation sample to play the evaluation audio, the method further includes: Controlling the current evaluation sample to play reference audio; Based on the sound pressure level of the reference audio, the volume of the current evaluation sample is adjusted.

[0013] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the sound quality evaluation method as described above is implemented.

[0014] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the sound quality evaluation method as described above is implemented.

[0015] The sound quality evaluation system, method and medium provided by the present invention, through random evaluation order, effectively reduce the subjective bias of the evaluators caused by the sample order, and ensure the fairness of the evaluation. The automated sample switching and transmission operations significantly improve the evaluation efficiency and avoid time delays and human errors caused by manual operation. Each sample is tested at the same evaluation point to ensure the consistency of the test conditions and improve the accuracy and reliability of the results. Automated control not only reduces human intervention and reduces the risk of operational errors, but also makes the evaluation process more efficient and accurate, ensuring the smooth progress of the entire evaluation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the sound quality evaluation system provided by the present invention.

[0018] Figure 2 It is a logical schematic diagram of the volume adjustment provided by the present invention.

[0019] Figure 3 This is the processing flow of speech recognition provided by the present invention.

[0020] Figure 4 It is a flow chart of the sound quality evaluation method provided by the present invention.

[0021] Figure 5 It is a structural schematic diagram of the sound quality evaluation device provided by the present invention.

[0022] Figure 6 It is a structural schematic diagram of the electronic device provided by the present invention.

[0023] Reference numerals: 100: control unit; 110: transmission unit; 120: sample to be tested; 130: evaluation personnel; 140: first microphone; 150: second microphone. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Sound quality evaluation is an important step in measuring the performance of audio equipment and is widely used in the research and development and testing of products and equipment such as speakers, headphones, and smart speakers. By evaluating multiple sound quality dimensions such as the low frequency, clarity, and spatial sense of the device, sound quality evaluation can help developers optimize the design of audio equipment and ensure that the product can provide a high-quality auditory experience in actual use. At the same time, sound quality evaluation is crucial to the verification process of product equipment before it is launched on the market. It can effectively identify the sound performance problems of the equipment and ensure that it meets market demand and consumer expectations.

[0026] However, most existing sound quality evaluation technologies rely on manual operations, and there are a series of shortcomings that need to be improved. First, the volume adjustment process is usually performed manually by testers. Although the volume can be adjusted according to the sense of hearing, this method is prone to errors, especially when comparing multiple audio devices. Since the volume cannot be strictly consistent, the accuracy of the evaluation results is greatly reduced. Different audio devices have different default output volumes during the design and manufacturing process, which makes it difficult to manually adjust the volume to ensure that all devices are tested under the same conditions, which may lead to unfair comparisons.

[0027] Secondly, in the process of sound quality evaluation, each audio device to be evaluated needs to be used as a sample, and the sample switching process is also completed manually. Every time the audio device is switched, the evaluator needs to spend time on manual operation, which results in a slow switching speed between samples. Since the human ear usually has a short memory time for sound quality characteristics (about 4 to 8 seconds), when the sample switching exceeds this time period, the evaluator's auditory memory begins to decay, which in turn affects the accuracy and reliability of the evaluation. Therefore, the delay in the switching process directly leads to a reduction in the accuracy of detail comparison in the sound quality evaluation.

[0028] In addition, manual recording of evaluation results is also a weak link in existing methods. Testers need to manually record the scores and subjective evaluations of each device, which not only increases the workload of the evaluation process, but also easily leads to errors or confusion in data recording. Especially when faced with a large amount of test data, the efficiency is low and there are errors caused by human factors. These problems make it difficult for the efficiency and accuracy of existing sound quality evaluation systems to meet the current needs of audio equipment development and testing. An automated and intelligent solution is urgently needed to improve the accuracy and efficiency of evaluation.

[0029] Figure 1 Schematic diagram of the structure of the sound quality evaluation system provided by the present invention. Figure 1 As shown, the system includes: a control unit 100, a transmission unit 110, and a plurality of samples to be tested 120; The control unit 100 is used to determine the current evaluation sample from the multiple samples to be tested 120 based on the random evaluation order, and perform a sound quality evaluation operation on the current evaluation sample; and when receiving a sample switching instruction, based on the random evaluation order, use the next sample to be tested of the current evaluation sample as the current evaluation sample, and return to perform the sound quality evaluation operation; The sound quality evaluation operation includes controlling the transmission unit 110 to transmit the current evaluation sample 120 to the evaluation point, and controlling the current evaluation sample to play the evaluation audio after the transmission is completed.

[0030] Specifically, the sample to be tested 120 is a sample that needs to be evaluated for sound quality, which is usually an audio device, such as headphones, speakers, loudspeakers or other electronic devices with audio playback functions. The control unit 100 can be connected to the sample to be tested 120 to control the sample to be tested 120 to play audio, or adjust the volume, track and other parameters of the sample to be tested 120 during playback.

[0031] The conveying unit 110 is a device that can drive the sample 120 to move, such as a slide rail, a mechanical arm, etc. The control unit 100 can be connected to the conveying unit 110 to control the conveying unit 110 to drive one or more of the multiple samples 120 to move.

[0032] The main function of the control unit 100 is to dynamically select the sample that needs to be evaluated from the multiple samples 120 to be tested based on a preset random evaluation order, that is, to determine the current evaluation sample. This process first relies on the random algorithm set in the control unit 100, such as the Knuth-Shuffle algorithm, which can generate a non-fixed and completely random evaluation order of the samples to be tested. In this way, it can avoid any prejudgment or expectation of the order of the samples 100 to be tested by the evaluator, ensuring that the evaluation conditions of each sample 100 to be tested are fair and independent.

[0033] After the random evaluation order is determined, the control unit 100 will instruct the transmission unit 110, such as a slide rail or a mechanical arm, to transmit the current evaluation sample to the evaluation point. At this time, various hardware connected to the control unit 100, such as a microphone and a volume control device, monitor and control the sound quality signal emitted by the current evaluation sample in real time, and further evaluate it.

[0034] The control unit 100 is also responsible for managing the switching of the sample to be tested 120. After the sound quality evaluation operation of the current evaluation sample is completed, the control unit 100 receives the switching instruction, selects the next sample to be tested based on the preset random evaluation order, and automatically switches it to the evaluation point. At this time, the new sample will be set as the current evaluation sample, and the same sound quality evaluation operation will be performed again. Throughout the process, the automation of the evaluation operation and the randomization of the evaluation order can ensure the standardization of the evaluation environment, eliminate human interference, and ensure the fairness, accuracy and consistency of the evaluation results.

[0035] After the current evaluation sample successfully reaches the evaluation point, the control unit 100 will then control the sample to start playing the preset evaluation audio. The evaluation audio is usually a specially designed test track that covers different frequency ranges and sound characteristics, which is used to evaluate the performance of the current evaluation sample under various acoustic conditions. The control unit is not only responsible for starting the playback, but also for ensuring that key parameters such as the playback volume and sound pressure level meet the preset standards. For example, the sound pressure of the playback is monitored in real time by measuring the microphone, and the volume is automatically adjusted according to the predetermined target (such as 75dB±1dB) to ensure that each sample to be tested is evaluated under uniform volume conditions.

[0036] The sound quality evaluation system provided by the present invention effectively reduces the subjective bias of the evaluators caused by the order of the samples to be tested by randomizing the evaluation order, thereby ensuring the fairness of the evaluation. The automated switching and transmission operations of the samples to be tested significantly improve the evaluation efficiency and avoid time delays and human errors caused by manual operations. Each sample to be tested is tested at the same evaluation point, ensuring the consistency of the test conditions and improving the accuracy and reliability of the results. Automated control not only reduces human intervention and reduces the risk of operational errors, but also makes the evaluation process more efficient and accurate, ensuring the smooth progress of the entire evaluation process.

[0037] Based on the above embodiment, the conveying unit includes a height conveying subunit; The height transmission subunit is used to adjust the current evaluation sample to a target height, and the target height is determined based on the personnel information of the evaluation personnel.

[0038] like Figure 1 As shown, the evaluator 130 is located at the center of the evaluation scene. The evaluator 130 is a key subject in the test process and is responsible for testing the performance and function of the sound quality of the sample 120 through the audio played by the sample 120. The operation and feedback of the evaluator are important inputs for the sound quality evaluation.

[0039] During the specific operation, the current evaluation sample will be adjusted vertically by the lifting device in the height transmission subunit until it reaches the preset target height. This process is achieved through the stepper motor or hydraulic lifting platform of the equipment, which can accurately control the height change of the current evaluation sample and avoid sound quality deviation caused by improper position of the current evaluation sample. It should be noted that the present invention does not limit the implementation method of height adjustment.

[0040] The height adjustment of the current sample to be tested depends on the personal information of the evaluator 130. For example, each evaluator can be assigned a unique code, which is associated with the name, height and other information of the evaluator. Based on this information, the personalized height setting can be automatically matched to make the height of the current sample to be tested adapt to the best listening position of the evaluator. For another example, the sample height can also be dynamically adjusted based on the height of the evaluator 130 to match the ear position.

[0041] In addition, the height of the sample may also take into account the acoustic characteristics of the evaluation environment, such as sound reflection, sound absorption conditions, etc., to ensure that the audio is not affected by external conditions during the transmission process, thereby providing more accurate evaluation results.

[0042] Through such high-level adjustment, each sound quality evaluation can be conducted under unified and optimized conditions, so that the performance of the audio equipment can be truly reflected. This high-level adjustment process based on the information of the evaluators greatly improves the scientificity and personalization of the evaluation, ensures the consistency of the results between different evaluators, and avoids the influence of human factors on the evaluation.

[0043] Based on the above embodiment, the sound quality evaluation system further includes a driving unit, which is used to drive the transmission unit to move under the control of the control unit; The transmission unit and the plurality of samples to be tested are arranged in a first space, the control unit and the driving unit are arranged in a second space, and the first space and the second space are isolated from each other.

[0044] Specifically, the drive unit is used to drive the conveyor unit to move under the command of the control unit to ensure smooth switching and precise positioning of the samples to be tested. The drive unit can use a stepper motor, servo motor or other precision drive device, which can accurately control the moving speed, travel distance and docking position of the conveyor unit. Through the action of the drive unit, multiple samples to be tested can be moved from the storage position to the evaluation point in an orderly manner according to the pre-set random evaluation order, thereby realizing automatic switching of samples to be tested and avoiding delays and errors caused by manual operation.

[0045] like Figure 1As shown, the transmission unit 110 and multiple samples to be tested 120 are all arranged in the first space, which is usually designed as a professional test room that has been acoustically treated. The environmental requirements of the first space are relatively high, and factors such as noise and acoustic reflection are usually strictly controlled to ensure that the acoustic conditions during sound quality evaluation remain consistent and stable. All samples to be tested 120 are placed in the first space and moved to the evaluation point by the transmission unit 110. The position of the evaluation point is fixed and precisely designed to ensure that each sample to be tested is in the same acoustic environment during the evaluation, so that the test results are highly consistent and comparable.

[0046] Separated from it is the second space, which is specifically used to place devices that generate noise or interference, such as the control unit 100 and the drive unit. The control unit 100 is responsible for managing the operation of the entire sound quality evaluation system, including the movement control of the transmission unit 110, the execution of the switching sequence of the sample to be tested 120, and the volume adjustment and other operations. The drive unit provides power support in the second space to ensure that the transmission unit 110 can complete the task smoothly and accurately. By separating the control unit 100 and the drive unit from the sample to be tested 120 and the transmission unit 110, the influence of interference factors such as motor noise and mechanical vibration on the sound quality evaluation process can be effectively avoided, ensuring the purity of the evaluation environment.

[0047] This spatial isolation design helps maintain the objectivity and accuracy of sound quality evaluation. The first space is focused on sound quality evaluation, ensuring that the samples to be tested are tested under quiet and interference-free conditions; while the second space is used to isolate external factors such as equipment noise and mechanical vibration that may affect the evaluation. Through this design, the sound quality evaluation system can provide a stable testing environment, making the evaluation results more reliable, further improving the accuracy and consistency of the test, and also improving the evaluation efficiency. This systematic division of labor and cooperation can meet the needs of complex sound quality evaluation scenarios and ensure that each link in the test process can be carried out smoothly and efficiently.

[0048] Based on the above embodiment, the sound quality evaluation system further includes a first microphone; The control unit is also used to control the current evaluation sample to play the reference audio before controlling the current evaluation sample to play the evaluation audio, and at the same time control the first microphone to collect the sound pressure level of the reference audio, and adjust the volume of the current evaluation sample based on the sound pressure level.

[0049] The first microphone is used to collect audio signals in real time during the evaluation process to ensure accurate evaluation of the sound quality of the sample. At the same time, the control unit is not only used to manage the operation of the transmission unit and the drive unit, but also undertakes the task of volume adjustment before the sound quality evaluation to ensure that all samples to be tested play audio under the same standard.

[0050] Specifically, before performing the formal sound quality evaluation, the control unit will control the current evaluation sample to play a reference audio first. This reference audio is a preset standard audio signal, and its main purpose is to prepare for the subsequent sound quality evaluation and ensure that the playback volume of each sample to be tested is within a reasonable range to achieve consistency in the evaluation.

[0051] like Figure 1 As shown, the first microphone 140 is located next to the evaluator 130. While playing the reference audio, the first microphone 140 will collect the sound pressure level data emitted by the current evaluation sample in real time. The sound pressure level data will be used to compare the actual volume of the sample with the standard sound pressure level preset by the system. Through this collection process, it can be determined whether the playback volume of the current evaluation sample meets the expected requirements. If it is found that the volume deviation is too large, the control unit will adjust the volume of the current evaluation sample according to the collected sound pressure level data to ensure that it is consistent with the preset standard sound pressure level. Through this automated volume calibration operation, it is ensured that each sample is at the same volume level during the evaluation process to reduce the impact of volume differences on the evaluation results.

[0052] After the volume adjustment is completed, the formal sound quality evaluation audio will be played, and the evaluators will evaluate the sound quality of the current sample to be tested under uniform volume conditions.

[0053] The volume adjustment process based on reference audio and sound pressure level acquisition ensures that each sample to be tested has undergone necessary volume calibration before formal evaluation, providing a stable and unified environment for subsequent sound quality evaluation. This mechanism not only improves the accuracy and consistency of the evaluation, but also greatly reduces the errors and subjective bias caused by human operation, making the evaluation results more objective.

[0054] Based on the above embodiment, the control unit is specifically configured to adjust the volume of the current evaluation sample based on the difference between the sound pressure level and the target sound pressure level.

[0055] Specifically, the control unit accurately adjusts the volume of the current evaluation sample according to the difference between the currently collected sound pressure level and the preset target sound pressure level.

[0056] Figure 2 FIG. 1 is a logical diagram of the volume adjustment provided by the present invention. Figure 2 As shown, the current test sample first plays the specified test track. The test track covers different frequencies and sound quality characteristics, aiming to comprehensively test the performance of the audio device. During the playback process, the first microphone is responsible for receiving the played audio signal and recording the sound pressure level data in real time. These data then enter the analysis stage to evaluate the current playback volume.

[0057] During the analysis process, the collected sound pressure level data will be compared with the predetermined target sound pressure level. The target sound pressure level is set according to the evaluation standard to ensure that all samples to be tested are tested under the same volume conditions, thereby ensuring the comparability and consistency of the test results. Determining whether the sound pressure level meets the requirements is a key step. If the sound pressure level meets the requirements, the process will enter the next step; otherwise, the volume needs to be adjusted.

[0058] Volume adjustment is achieved through gain adjustment, which is to amplify or reduce the intensity of the audio signal to ensure that the playback volume is close to the target sound pressure level. After the volume is adjusted, the first microphone receives the audio signal again and re-analyzes the adjusted sound pressure level. If the volume still does not reach the target value, further gain adjustment will continue until the sound pressure level meets the requirements.

[0059] This process can be executed repeatedly until the volume of the current evaluation sample meets the evaluation standard, ensuring consistency with the volume of each sample to be tested in the subsequent evaluation process. After the evaluation is completed, the entire process ends and all evaluation data is recorded. Through such a process, sound quality evaluation can achieve fair and accurate results and ensure consistency of volume conditions during the evaluation process.

[0060] Based on the above embodiment, the sound quality evaluation system further includes a second microphone; The second microphone is used to collect voice data of the evaluator; The control unit is further configured to perform speech recognition on the speech data, and determine a sound quality evaluation result of the current evaluation sample based on a text obtained through speech recognition.

[0061] Specifically, Figure 1 In the example, the second microphone 150 is specifically used to collect voice data provided by the evaluator 130 during the evaluation process. The second microphone 150 is usually located near the evaluator 130 so as to capture the voice input of the evaluator 130 in real time and clearly during the sound quality evaluation process. The evaluator can directly give a subjective evaluation of the current evaluation sample through voice, including sound quality perception, detailed description or scoring information.

[0062] After receiving the voice data collected by the second microphone 150, the control unit 100 performs voice recognition on the data. Voice recognition can convert the voice instructions of the evaluator into text information. Through this recognition process, the voice comments, scores or feedback of the evaluator are automatically converted into text content that the control unit can understand and process.

[0063] Figure 3 This is the processing flow of speech recognition provided by the present invention. Figure 3As shown, in the input control stage, the collection of voice data is optimized to avoid interference from invalid signals, such as adjusting the sampling frequency, suppressing background noise, etc., to ensure that the captured signal has good quality.

[0064] The voice data is received by the second microphone 150, and the signal quality is managed through line control to ensure that the voice data is complete and stable during transmission. Subsequently, the voice data is converted by ADC (Analog-to-Digital Conversion) to convert the analog voice signal into a digital signal for subsequent analysis and processing.

[0065] At the digital signal stage, endpoint detection is performed to accurately identify the start and end points of the voice data, remove the silent part, and ensure that the processed signal segment is valid voice. This step will determine the detection method based on the method selection to cope with different noise environments and ensure the accuracy of the detection.

[0066] Next is the parameter analysis stage, where the voice data is deeply analyzed to extract key voice features such as frequency, pitch, intensity, etc. During this process, anti-noise processing is used to reduce the impact of environmental noise and ensure that the voice data is clear enough. At the same time, the computation and storage reduction mechanism optimizes the use of resources, reducing unnecessary computation consumption during parameter analysis to improve efficiency and save storage space.

[0067] In the speech recognition stage, model tools and editing tools play an important role. The model tool generates a speech model by training speech data, helps recognize the input speech signal, and converts it into text. After the speech model is optimized, it can cope with different pronunciations, speaking speeds, and background noise to ensure the accuracy of recognition. The editing tool ensures that the system can recognize the correct words and sentence structures based on the dictionary library and grammar. The dictionary contains all possible words and their phonemes, and the grammar defines how words are combined. The editing tool uses the dictionary and grammar to make the recognition results more consistent with actual language use and avoid recognition errors. If there is a recognition question, alternative recognition results can also be provided through the candidate selection mechanism to ensure the final accuracy.

[0068] Ultimately, the recognized text will be integrated with the actual operating system or related applications through application development tools to achieve automatic processing of voice commands or data recording, ensuring efficient connection and seamless execution of the entire process.

[0069] Figure 4 It is a flow chart of the sound quality evaluation method provided by the present invention, such as Figure 4 As shown, the method includes: Step 410, based on a random evaluation order, determine the current evaluation sample from multiple samples to be tested, and perform a sound quality evaluation operation on the current evaluation sample. The sound quality evaluation operation includes controlling the transmission unit to transmit the current evaluation sample to the evaluation point, and controlling the current evaluation sample to play the evaluation audio after the transmission is completed.

[0070] Specifically, a random evaluation order of the samples to be tested is generated through a random algorithm (such as the Knuth-Shuffle algorithm) to ensure that the probability of each sample to be tested appearing in different positions is equal. This can avoid the subjective bias caused by the fixed order of the samples to be tested, and ensure that the evaluators cannot know the brand or model of the next sample to be tested in advance, and can only focus on the sound quality itself.

[0071] After determining the current evaluation sample, the transport unit is responsible for automatically transporting the selected current evaluation sample to the preset evaluation point. During the transmission process, you can consider using a slide rail or a robotic arm to ensure that the sample reaches the evaluation point accurately, and the height and angle meet the standard requirements of the sound quality evaluation. This step is completed by an automated device, which greatly reduces the time required to manually adjust the evaluation point and placement of the current evaluation sample, and ensures consistent test conditions.

[0072] When the current sample to be tested arrives at the evaluation point, the preset evaluation audio will start playing. These audios are standardized test tracks that cover multiple frequency bands and different acoustic characteristics in order to comprehensively evaluate the sound quality performance of the sample. During audio playback, the volume is automatically adjusted to the predetermined target sound pressure level to ensure that all samples are tested under the same volume conditions, thereby reducing deviations caused by volume differences.

[0073] While the audio is playing, the reviewers will conduct subjective evaluations of the samples based on different sound quality dimensions (such as low frequency, clarity, spatial sense, etc.). For example, the specific sound quality dimensions are shown in the following table:

[0074] In order to improve the efficiency and accuracy of the evaluation, voice recognition is introduced in the evaluation process to automatically record the score and notes. Evaluators do not need to enter data manually, but only need to directly enter the score or describe the sound quality characteristics through voice, such as "3.5 points" or "low frequency is thick, high frequency is clear". Voice recognition can recognize and transcribe these voice data in real time to ensure the fast and accurate entry of evaluation data. At the same time, voice recognition can automatically associate the score with the sample, reducing the delays and errors that may occur in the traditional manual recording process. This not only improves the efficiency of data processing, but also greatly reduces the subjective bias caused by manual operation, making the evaluation process smoother and more efficient.

[0075] Step 420: When a sample switching instruction is received, the next sample to be tested of the current evaluation sample is used as the current evaluation sample based on the random evaluation order, and the sound quality evaluation operation is returned to be performed.

[0076] After the evaluation of the current evaluation sample is completed, the sample switching operation will be triggered. At this time, according to the random evaluation order table, the current evaluation sample will be replaced by the next sample to be tested. The conveying unit will automatically convey the next sample to be tested to the preset evaluation point. During the transmission process, the conveying unit accurately adjusts the height and position of the sample to ensure the consistency of the evaluation environment of each evaluation sample. After the sample is delivered to the location and the relevant adjustments are completed, the evaluation operation continues.

[0077] All steps of the sample switching process, from receiving the switching instruction to the new sample starting to play audio, are automated. This process not only significantly improves the evaluation efficiency, but also reduces the auditory memory attenuation problem caused by long sample switching time. Compared with the traditional manual sample switching method, this automated switching method greatly reduces the impact of human factors on the sound quality evaluation results, allowing each sample to be compared and evaluated under the same test conditions.

[0078] The sound quality evaluation method provided by the present invention effectively reduces the subjective bias of the evaluators caused by the sample order through random evaluation order, thereby ensuring the fairness of the evaluation. The automated sample switching and transmission operations significantly improve the evaluation efficiency and avoid time delays and human errors caused by manual operations. Each sample is tested at the same evaluation point to ensure the consistency of the test conditions and improve the accuracy and reliability of the results. Automated control not only reduces human intervention and reduces the risk of operational errors, but also makes the evaluation process more efficient and accurate, ensuring the smooth progress of the entire evaluation process.

[0079] Based on the above embodiment, before controlling the current evaluation sample to play the evaluation audio, the method further includes: Controlling the current evaluation sample to play reference audio; Based on the sound pressure level of the reference audio, the volume of the current evaluation sample is adjusted.

[0080] Before officially playing the test audio, you need to play a standardized reference audio first. This reference audio is used to establish a volume benchmark, which can provide a reference for subsequent volume calibration. The selection of reference audio is crucial, and its consistency and repeatability must be ensured so that all samples to be tested can be calibrated under the same conditions. This step provides a unified sound output benchmark for subsequent sound quality evaluation, ensuring fairness in the evaluation between samples to be tested.

[0081] While playing the reference audio, the control unit detects the sound pressure level of the current evaluation sample and compares the actual sound pressure level with the preset target sound pressure level. If the actual sound pressure level deviates from the target value, the volume needs to be adjusted accordingly. If the sound pressure level of the reference audio is higher than the target value, the volume will be lowered; if it is lower than the target value, the volume needs to be increased. This adjustment ensures that during the subsequent evaluation audio playback process, the sample is played at a consistent sound pressure level, thereby avoiding the impact of volume differences on the evaluation results.

[0082] This adjustment process ensures that all samples to be tested undergo precise volume calibration before evaluation, making the sound quality evaluation process more fair and reducing the auditory perception deviation caused by volume differences.

[0083] The sound quality evaluation device provided by the present invention is described below. The sound quality evaluation device described below and the sound quality evaluation method described above can be referred to each other.

[0084] Figure 5 Schematic diagram of the structure of the sound quality evaluation device provided by the present invention. Figure 5 As shown, the device comprises: The evaluation sample selection unit 510 is used to determine the current evaluation sample from multiple samples to be tested based on a random evaluation order, and perform a sound quality evaluation operation on the current evaluation sample. The sound quality evaluation operation includes controlling the transmission unit to transmit the current evaluation sample to the evaluation point, and controlling the current evaluation sample to play the evaluation audio after the transmission is completed.

[0085] The evaluation sample switching unit 520 is used to, upon receiving a sample switching instruction, take the next sample to be tested of the current evaluation sample as the current evaluation sample based on the random evaluation order, and return to perform the sound quality evaluation operation.

[0086] The sound quality evaluation device provided by the present invention optimizes the traditional sound quality evaluation process in an automated manner. The sample evaluation order is randomly selected, eliminating human subjective bias and making the evaluation more fair. The automated transmission device and volume adjustment technology ensure the efficient and accurate sample switching and volume calibration, avoiding the uncertainty and error in manual operation. At the same time, the sound pressure level calibration based on the reference audio allows the evaluation to be carried out under consistent volume conditions, ensuring the reliability of the test results.

[0087] Based on any of the above embodiments, the evaluation sample selection unit is specifically used for: Controlling the current evaluation sample to play reference audio; Based on the sound pressure level of the reference audio, the volume of the current evaluation sample is adjusted.

[0088] Figure 6An example of a physical structure diagram of an electronic device is shown in FIG. Figure 6 As shown, the electronic device may include: a processor 610, a communication interface 620, a memory 630 and a communication bus 640, wherein the processor 610, the communication interface 620 and the memory 630 communicate with each other through the communication bus 640. The processor 610 may call the logic instructions in the memory 630 to execute the sound quality evaluation method, which includes: Based on the random evaluation order, determine the current evaluation sample from multiple samples to be tested, and perform a sound quality evaluation operation on the current evaluation sample, wherein the sound quality evaluation operation includes controlling a transmission unit to transmit the current evaluation sample to an evaluation point, and controlling the current evaluation sample to play the evaluation audio after the transmission is completed; When a sample switching instruction is received, the next sample to be tested of the current evaluation sample is used as the current evaluation sample based on the random evaluation order, and the sound quality evaluation operation is returned to be performed.

[0089] In addition, the logic instructions in the above-mentioned memory 630 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the relevant technology or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0090] On the other hand, the present invention further provides a computer program product, the computer program product includes a computer program, the computer program can be stored in a non-transitory computer-readable storage medium, when the computer program is executed by a processor, the computer can execute the sound quality evaluation method provided by the above methods, the method includes: Based on the random evaluation order, determine the current evaluation sample from multiple samples to be tested, and perform a sound quality evaluation operation on the current evaluation sample, wherein the sound quality evaluation operation includes controlling a transmission unit to transmit the current evaluation sample to an evaluation point, and controlling the current evaluation sample to play the evaluation audio after the transmission is completed; When a sample switching instruction is received, the next sample to be tested of the current evaluation sample is used as the current evaluation sample based on the random evaluation order, and the sound quality evaluation operation is returned to be performed.

[0091] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the sound quality evaluation method provided by the above methods is implemented, and the method includes: Based on the random evaluation order, determine the current evaluation sample from multiple samples to be tested, and perform a sound quality evaluation operation on the current evaluation sample, wherein the sound quality evaluation operation includes controlling a transmission unit to transmit the current evaluation sample to an evaluation point, and controlling the current evaluation sample to play the evaluation audio after the transmission is completed; When a sample switching instruction is received, the next sample to be tested of the current evaluation sample is used as the current evaluation sample based on the random evaluation order, and the sound quality evaluation operation is returned to be performed.

[0092] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0093] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sound quality evaluation system, characterized in that: It includes a control unit, a transmission unit, and a plurality of samples to be tested; The control unit is used to determine a current evaluation sample from the multiple samples to be tested based on a random evaluation order, and perform a sound quality evaluation operation on the current evaluation sample; And in the case of receiving a sample switching instruction, taking the next sample to be tested of the current evaluation sample as the current evaluation sample based on the random evaluation order, and returning to perform the sound quality evaluation operation; The sound quality evaluation operation includes controlling the transmission unit to transmit the current evaluation sample to the evaluation point, and controlling the current evaluation sample to play the evaluation audio after the transmission is completed.

2. The sound quality evaluation system according to claim 1, characterized in that: The conveying unit includes a height conveying subunit; The height transmission subunit is used to adjust the current evaluation sample to a target height, and the target height is determined based on the personnel information of the evaluation personnel.

3. The sound quality evaluation system according to claim 1, characterized in that: Also includes a driving unit, the driving unit is used to drive the conveying unit to move under the control of the control unit; The transmission unit and the plurality of samples to be tested are arranged in a first space, the control unit and the driving unit are arranged in a second space, and the first space and the second space are isolated from each other.

4. The sound quality evaluation system according to claim 1, characterized in that: Also included is the first microphone; The control unit is also used to control the current evaluation sample to play the reference audio before controlling the current evaluation sample to play the evaluation audio, and at the same time control the first microphone to collect the sound pressure level of the reference audio, and adjust the volume of the current evaluation sample based on the sound pressure level.

5. The sound quality evaluation system according to claim 4, characterized in that: The control unit is specifically configured to adjust the volume of the current evaluation sample based on the difference between the sound pressure level and the target sound pressure level.

6. The sound quality evaluation system according to any one of claims 1 to 5, characterized in that: A second microphone is also included; The second microphone is used to collect voice data of the evaluator; The control unit is further configured to perform speech recognition on the speech data, and determine a sound quality evaluation result of the current evaluation sample based on a text obtained through speech recognition.

7. A sound quality evaluation method, characterized in that: include: Based on the random evaluation order, determine the current evaluation sample from multiple samples to be tested, and perform a sound quality evaluation operation on the current evaluation sample, wherein the sound quality evaluation operation includes controlling a transmission unit to transmit the current evaluation sample to an evaluation point, and controlling the current evaluation sample to play the evaluation audio after the transmission is completed; When a sample switching instruction is received, the next sample to be tested of the current evaluation sample is used as the current evaluation sample based on the random evaluation order, and the sound quality evaluation operation is returned to be performed.

8. The sound quality evaluation method according to claim 7, characterized in that: Before controlling the current evaluation sample to play the evaluation audio, the method further includes: Controlling the current evaluation sample to play reference audio; Based on the sound pressure level of the reference audio, the volume of the current evaluation sample is adjusted.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the sound quality evaluation method according to claim 7 or 8 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the sound quality evaluation method according to claim 7 or 8 is implemented.

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