200803577 九、發明說明： 【發明所屬之技術領域】 '科明涉及-種聽力保護时法及系統 .種應用於音頻播放時的聽力保護方法及且士兮m以 的音頻播放系統。 、有聽力保護功能 【先前技術】 音樂已經成為人們生活的一部分，尤其是上隹於、與與 生族。然而，沒有節制地收聽音樂會導致聽力 研究表明’聽眾在收聽音樂時應當將音量限制在通分貝 以下，而且連續收聽時間應當限制在—小時内。否則，將 可能造成永久性的聽力損傷。 ' 現有技術中，聽眾可以設置音頻播玫裝置的最大音量 以及連續收聽時間，當該連續收聽時間到達時該立頻= 裝置將自動停止播故音樂並自動關機，然而這種^法 死板而且不夠人性化。 父 【發明内容】 有鑒於此，有必要提供一種應用於音頻播放時的聽力 保護方法，包括下列步驟：接收一播放命令；讀取立 標進行播放並累積一播放時間T1;判斷播放時間j 達到-預設播玫時間K1，並當確定播放時間τι : 播放時間K1時，進人一聽力保護模式，讀取預 = 檔進行播放。 曰頻文 有鐾於此，還有必要提供一種具有聽力保護功能 頻播放系統’該系統包括一存儲單元、一命令輸入單元二 200803577 一微處理單元。該微處理單元響應該命令輸入單元生成的 播放命令，從該存儲單元讀取一音頻文檔進行播放。該存 儲單元存儲有一或複數預設的舒緩音頻文檔。該微處理單 元包括一偵測模組，響應該播放命令累積一播放時間τι; 及一模式控制模組，判斷播放時間T1是否達到一預設播放 時間K1，當確定播放時間T1達到預設播放時間K1時控 制進入一聽力保護模式，從該存儲單元中讀取該預設音頻 文檔進行播放。 相較於現有技術，所述應用於音頻播放時的聽力保護 方法及具有聽力保護功能的音頻播放系統，當連續播放音 頻的時間達到預設播放時間K1時，該音頻播放系統會自動 切換到預設的舒緩音樂進行播放，從而防止聽眾的聽力疲 勞。下面將結合附圖對本發明的實施方式進行說明。 【實施方式】 如圖1所示，是具有聽力保護功能的音頻播放系統的 架構圖。該音頻播放系統10可以是一手持式的音頻播放器 如MP3播放器等，也可以是運行於電腦的音頻播放軟體系 統如Winamp等。該音頻播放系統10包括一微處理單元 11、一命令輸入單元12、一存儲單元13、一數位類比轉換 器14、一放大器15、一介面單元16及一顯示單元17。 存儲單元13存儲有複數音頻文檔及一音頻解碼程 式。顯示單元17為聽眾提供一顯示介面，用於顯示音頻文 檔的名稱、演唱者、播放時間及設置訊息等。 請一並參考圖2,是第一實施方式中設置聽力保護模 200803577200803577 IX. INSTRUCTIONS: [Technical field to which the invention pertains] 'Koming is involved in a hearing protection method and system. The hearing protection method used in audio playback and the audio playback system of the gentry. Hearing protection function [Prior Art] Music has become a part of people's lives, especially in Shangyu, and in the family. However, listening to the concert without restraint led to hearing studies indicating that the listener should limit the volume below the decibel when listening to music, and the continuous listening time should be limited to within - hours. Failure to do so may result in permanent hearing damage. In the prior art, the listener can set the maximum volume of the audio broadcast device and the continuous listening time. When the continuous listening time arrives, the vertical frequency = the device will automatically stop the broadcast music and automatically shut down, but this method is rigid and not enough. Humanize. Parent [Invention] In view of this, it is necessary to provide a hearing protection method for audio playback, comprising the steps of: receiving a play command; reading a standard for playing and accumulating a play time T1; determining that the play time j is reached - Preset the broadcast time K1, and when determining the play time τι : play time K1, enter a hearing protection mode, read the pre-file for playback. In view of this, it is also necessary to provide a frequency playback system with hearing protection function. The system includes a storage unit, a command input unit 2 200803577, a micro processing unit. The micro processing unit reads an audio file from the storage unit for playback in response to the play command generated by the command input unit. The storage unit stores one or more preset soothing audio files. The micro processing unit includes a detecting module, and accumulates a playing time τι in response to the playing command; and a mode control module determines whether the playing time T1 reaches a preset playing time K1, and determines that the playing time T1 reaches the preset playing time. At time K1, the control enters a hearing protection mode, and the preset audio file is read from the storage unit for playing. Compared with the prior art, the audio protection system applied to audio playback and the audio playback system with hearing protection function automatically switch to the pre-reading time when the time of continuously playing audio reaches the preset playing time K1. The soothing music is played to prevent hearing fatigue of the listener. Embodiments of the present invention will be described below with reference to the accompanying drawings. [Embodiment] As shown in Fig. 1, it is an architectural diagram of an audio playback system having a hearing protection function. The audio playback system 10 can be a handheld audio player such as an MP3 player, or an audio playback software system such as Winamp running on a computer. The audio playback system 10 includes a micro processing unit 11, a command input unit 12, a storage unit 13, a digital analog converter 14, an amplifier 15, an interface unit 16, and a display unit 17. The storage unit 13 stores a plurality of audio files and an audio decoding method. The display unit 17 provides a display interface for the listener to display the name of the audio document, the singer, the play time, and the setting information. Please refer to FIG. 2 together, and the hearing protection mode is set in the first embodiment.
式的介面示意圖。聽幕吁以通過該命令輸入單元12，在該 顯示單元17的顯示介面上開啟/關閉該音頻播放***的 聽力保護模式。聽眾還邛以進一步設置該音頻播放系統1〇 的預設播放時間K1、預設休息時間K2、一或複數預設立 頻文檔、及/或開啟/關閉該音頻播放系統10的音量限制功 能。當開啟該音量限制功能後，聽眾還可以進—步設置一 預設音量V。預設播放時間K1為聽眾連續收聽音頻文檔的 時間，如40分鐘。預設休息時間K2為聽眾連續收聽該預 設音頻文檔的時間，如1Q分鐘。設音敎檔為節奏 緩並且聽眾喜愛的歌曲或鱗曲等。該預^音量 聽♦休息的音量，如分貝。 ； 聽眾還可以通過該命令輸入單元12,在該顯示單元17 的顯示介面上選擇渴望播放的音頻文檔進行播放，由此該 命令輸入單元12產生一播放命令。 人 μ該根據該命令輸人單元12生成的播放 二“子儲單兀13讀取解碼程式及一音頻文檔，運行 該解碼程讀觸音頻域生錄位音頻訊號。 頻吼赛。姑士，換器14將該數位音頻訊號轉換為類比音 元'16:、、，丨J15將該類比音頻訊號放大後，通過介面單 的聲立"X馨立聲曰輸出裳置18輸出該類比音頻訊號對應 出裝置18可為一耳機或-揚聲器。 該微“單元J二是圖1中微處理單元10的模組圖。 巴括一偵測模組 116。該偵測模―應該命令輸入單 200803577 π令’從而偵測該音頻播放系統的聽力保護模式是否被開 啟，备確定該聽力保護模式被開啟時累積一播放時間τι。 該模式控制模組116判斷播放時間71是否達到預設播 放犄間Κ1备確定播放時間Τ1違到預設播放時間JQ時 進入該聽力保護模式，㈣存儲單元13中讀取該預設的音 頻文檔由該音頻播放系統10進行播放。Schematic diagram of the interface. The listening screen invokes the input unit 12 to turn on/off the hearing protection mode of the audio playback system on the display interface of the display unit 17. The listener is further configured to further set the preset playback time K1 of the audio playback system 1 , the preset rest time K2, one or a plurality of pre-set up documents, and/or turn on/off the volume limit function of the audio playback system 10. When the volume limit function is turned on, the listener can further set a preset volume V. The preset playing time K1 is the time for the listener to continuously listen to the audio document, such as 40 minutes. The preset rest time K2 is the time during which the listener continuously listens to the preset audio document, such as 1Q minutes. Set the sound files to be songs or scales that are slow and listen to the audience. The pre-Volume volume ♦ The volume of the break, such as decibels. The listener can also input the unit 12 through the command, and select an audio file that is desired to be played for playback on the display interface of the display unit 17, whereby the command input unit 12 generates a play command. The user μ should read the decoding program and an audio file generated by the input unit 12 according to the command input unit 12, and run the decoding process to read the audio field recording audio signal. Frequency racing. The converter 14 converts the digital audio signal into an analog sound element '16:,,, 丨J15, and then amplifies the analog audio signal, and outputs the analog audio through the interface sound of the interface. The signal corresponding device 18 can be an earphone or a speaker. The micro "unit J" is a module diagram of the micro processing unit 10 in FIG. A detection module 116 is included. The detection mode "should command the input form 200803577 π command" to detect whether the audio protection system of the audio playback system is turned on, and it is determined that the playback time τι is accumulated when the hearing protection mode is turned on. The mode control module 116 determines whether the play time 71 reaches the preset play time, determines the play time Τ1, enters the hearing protection mode when the preset play time JQ is violated, and (4) reads the preset audio file in the storage unit 13 Playback is performed by the audio playback system 10.
該权式，制松組116還偵測該音量限制功能是否被開 ，並田確疋該9里限制功能被開啟後，控制放大器b將 當前音量降低到聽I設置的預設音量V。 如圖4所 ，是第一實施方式中應用於音頻播放時的 程圖。該微處理單元11接收該命令輸入 而㈣令（㈣S4G);響應放命令從 ΓεΓΓ 1,?'^10 驟S41)。如果該微處理單元 被開啟，則根據該播放命;:二確 一音頻文槽（步驟S42)。存倚早⑽中項取並解碼 據確定該聽力保護模式被開啟，根 =:二=:中讀取並解碼-音_ 播放時間T1是否達到播:1 (^驟S44);然後判斷 如果該微處理單元n=pa，K1(步驟叫 播放K1 士主 播玫時間τι沒有達到預設 =:;=:，果該微處理單元η 狀態，控㈣音_放祕丨Q = 2 ’航錄當前播放 入I力保護模式，從該存 9 200803577 儲單元13中讀取並解碼預設的音頻文檔，並累積一間隔時 間T2,其中，該當前播放狀態包括當前播放音頻文檔的名 稱、所在的播放列表的名稱、當前音量等（步驟S46)。 接著，該微處理單元11判斷該音量限制功能是否被開 啟（步驟S47)。如果該微處理單元n確定該音量限制功 能沒有被開啟，則控制該放大器15保持當前音量（步驟 548) 。 如果該微處理單元11確定該音量限制功能被開啟，則 控制放大器15將當前音量降低到該預設音量v (步驟 549) 。該微處理單元11控制該放大器15放大並輸出該預 設音頻文檔對應的音頻訊號（步驟S50)。 接著，該微處理單元11判斷間隔時間T2是否達到預 設休息時間K2 (步驟S51)。如果該微處理單元11確定間 隔時間T2沒有達到預設休息時間K2,流程返回步驟S50; 如果該微處理單元11確定間隔時間T2達到預設休息時間 K2，則恢復到進入防疲勞模式前的播放狀態繼續播放（步 驟 S52)。 上述流程持續循環執行，直到該音頻播放系統10退出 聽力保護模式或停止播放為止。 請一並參考圖5,是第二實施方式中設置聽力保護模 式的介面示意圖。該第二實施方式與第一實施方式的不同 僅在於，該音頻播放系統10的設計者沒有提供開啟/關閉 聽力保護模式的開關，而是將聽力保護模式設計成該音頻 播放系統10的固有功能，也就是該音頻播放系統10播放 200803577 音頻文檔時自動開啟該聽力保護模式。 另外，該音頻播放系統10的設計者提供設置預設音頻 類型的介面及功能，替代第一實施方式中設置的預設音頻 文檔的介面及功能。該預設音頻類型的名稱由聽眾自定 義，如休息、舒缓等。聽眾可以將節奏比較舒缓並且喜愛 的音頻文檔的音頻類型名稱更改為該預設音頻類型的名 稱0The weighting mode 116 also detects whether the volume limit function is turned on. After the 9th limit function is turned on, the control amplifier b lowers the current volume to the preset volume V set by the listening I. As shown in Fig. 4, it is a flowchart applied to audio playback in the first embodiment. The microprocessor unit 11 receives the command input and (4) orders ((4)S4G); the response put command is from ΓεΓΓ 1,?'^10 (S41). If the microprocessor unit is turned on, then an audio channel is determined according to the playback time (step S42). It is determined that the hearing protection mode is turned on, root =: two =: medium read and decode - sound _ play time T1 reaches broadcast: 1 (^ S44); then judge if Micro processing unit n=pa, K1 (step is called playing K1, the main broadcast time τι does not reach the preset =:; =:, the micro processing unit η state, control (four) sound _ release secret = Q = 2 'track current Playing into the I-protection mode, reading and decoding the preset audio file from the storage unit 13 200803577, and accumulating an interval time T2, wherein the current playing state includes the name of the currently playing audio document, and the playing The name of the list, the current volume, etc. (step S46) Next, the micro processing unit 11 determines whether the volume limit function is turned on (step S47). If the micro processing unit n determines that the volume limit function is not turned on, then control the The amplifier 15 maintains the current volume (step 548). If the microprocessor unit 11 determines that the volume limit function is turned on, the control amplifier 15 lowers the current volume to the preset volume v (step 549). The microprocessor unit 11 controls the The amplifier 15 amplifies and outputs the audio signal corresponding to the preset audio file (step S50). Next, the micro processing unit 11 determines whether the interval time T2 reaches the preset rest time K2 (step S51). If the micro processing unit 11 determines the interval The time T2 does not reach the preset rest time K2, and the flow returns to step S50. If the micro processing unit 11 determines that the interval time T2 reaches the preset rest time K2, it resumes playing until the play state before entering the anti-fatigue mode (step S52). The above process continues to be executed cyclically until the audio playback system 10 exits the hearing protection mode or stops playing. Please refer to FIG. 5 together, which is a schematic diagram of the interface for setting the hearing protection mode in the second embodiment. The second embodiment and the first embodiment The embodiment differs only in that the designer of the audio playback system 10 does not provide a switch to turn the hearing protection mode on/off, but rather designs the hearing protection mode as an inherent function of the audio playback system 10, that is, the audio playback system 10 This hearing protection mode is automatically turned on when playing a 200203577 audio document. In addition, the audio The designer of the playback system 10 provides an interface and function for setting a preset audio type, instead of the interface and function of the preset audio document set in the first embodiment. The name of the preset audio type is customized by the listener, such as rest and soothing. Etc. The listener can change the audio type name of the audio file that is more soothing and favorite to the name of the preset audio type.
請一並參考 固 1¼方式與第一實施方式的 不同還在於’該設定模組11G響應該命令輸人單元乜生成 的設置該預設*頻麵的命令，從而設£該預設*頻類聖。 該摘測模組m接收到該命令輸入單元 命令後，開始累積一播故時間Tl。 χ爾 該权式控制模組116確定姚 夂播放恰間Τ1達到預設播放時 間時進入聽力保護模式，你w 從該存儲單元13中搜索屬於 該預設音頻類型的音頻文梓， μ 、 ^ ^並項取該音頻文檔由該音頻 播放糸統10進行播放。 如圖6所示 聽力保護料祕_。2^巾應祕音賴放時的 單元财成的齡命令，元11響應該命令輸入 ^音頻文檔（㈣料元13㈣取並解碼 然後判斷播放時間T1是否累放時間 s62)o 货建到預設播放時間K1 (步驟 如果該微處理單元u 播放時間K1，絲返回放時間T1沒有達到預設 鄉S61。如果該微處理單元u 11 200803577 確定播放時間Τι達到預設播放時間κι，則記錄當前播放 • 狀態’控制該音頻播放系統10進入聽力保護模式，從該存 ， 儲單元13中搜索屬於預設音頻類型的音頻文檔，讀取並解 ‘碼該音頻文檔，並累積一間隔時間Τ2，其中，該當前播放 狀態包括當前播放音頻文檔的名稱、所在的播放列表的名 稱、當前音量等（步驟S63)。 接著，該微處理單元η判斷該音量限制功能是否被開 參 啟（步驟S64)。如果該微處理單元u確定該音量限制功 能沒有被開啟，則控制該放大器15保持當前音量（步驟 S65 ) ° 如果該微處理單元11確定該音量限制功能被開啟，則 控制放大器15將當前音量降低到該預設音量ν (步驟 S66)。該微處理單元11控制該放大器15放大並輸出該預 設音頻文檔對應的音頻訊號（步驟S67)。 接著’該微處理單元11判斷間隔時間T2是否達到預 • 設休息時間K2 (步驟S68)。如果該微處理單元11確定間 隔時間Τ2沒有達到預設休息時間Κ2，流程返回步驟S67 ; 如果該微處理單元11確定間隔時間Τ2達到預設休息時間 Κ2，則恢復到進入防疲勞模式前的播放a態繼續播放（步 驟 S69)〇 上述流程持續循環執行，直到該音頻播放系統10退出 聽力保護模式或停止播放為止。 請一並參考圖7,是第三實施方式中設置聽力保護模 式的介面示意圖。該第三實施方式與第二實施方式的不同 12 200803577 僅在於，該音頻播放系統10的設計者沒有提供設置預設音 頻類塑的介面及功能’而是預先設置該預設音頻類型的名 . 稱如“保護”等，聽眾將節奏比較舒缓並且喜愛的音頻文 L 標的音頻類型名稱更改為該預設音頻類型的名稱。 請一並參考圖8,是第四實施方式中設置聽力保護模 式的介面示意圖。該第四實施方式與第二實施方式的不同 僅在於，該音頻播放系統10的設計者提供設置預設播放列 表的介面及功能，替代第二實施方式中設置的預設音頻類 型的介面及功能。 請一並參考圖3,該第四實施方式與第二實施方式的 不同還在於，該設定模組110響應該命令輸入單元12生成 的設置該預設音頻播放列表的命令，從而設置該預設播放 列表。 該模式控制模組116確定播放時間T1達到預設播放時 間K1時進入聽力保護模式，從該存儲單元13中讀取該預 設播放列表中的音頻文檔由該音頻播放系統10進行播放。 在上述第一實施方式至第四實施方式中，該音頻播放 系統10還可以不提供設置預設播放時間K1、預設休息時 間K1及預設音量V的介面及功能，而由該音頻播放系統 10的設計者預先設置預設播放時間K1、預設休息時間K1 及該預設音量V。在上述第一實施方式中，該音頻播放系 統10還可以不提供設置預設音頻文檔的介面及功能，而由 該音頻播放系統10的設計者預先設置該預設音頻文檔。 綜上所述，本發明所提出的應用於音頻播放時的聽力 200803577 保護方法及具有聽力保護功能的音頻播放系統確實可符合 . 發明專利要件，爰依法提出專利申請。惟，以上所述者僅 - 為本發明的應用於音頻播放時的聽力保護方法及具有聽力 , 保護功能的音頻播放系統的較佳實施例，舉凡熟悉本案技 藝的人士，在參照本發明精神所作的等效修飾或變化，皆 應包含於以下的申請專利範圍内。 【圖式簡單說明】 圖1是本發明的具有聽力保護功能的音頻播放系統的 方框圖。 圖2是本發明的第一實施方式中設置聽力保護模式的 介面示意圖。 圖3是本發明的第一實施方式中圖1中的微處理單元 的功能模組圖。 圖4是本發明的第一實施方式中應用於音頻播放時的 聽力保護方法的流程圖。 φ 圖5是本發明的第二實施方式中設置聽力保護模式的 介面不意圖。 圖6是本發明的第二實施方式中應用於音頻播放時的 聽力保護方法的流程圖。 圖7是本發明的第三實施方式中設置聽力保護模式的 介面示意圖。 圖8是本發明的第四實施方式中設置聽力保護模式的 介面示意圖。 14 200803577 【主要元件符號說明】 音頻播放系統 10 微處理單元 11 命令輸入單元 12 存儲單元 13 數位類比轉換器 14 放大器 15 介面單元 16 顯示單元 17 聲音輸出裝置 18 偵測模組 114 模式控制模組 116 15The difference between the reference and the first embodiment is that the setting module 11G responds to the command of the command input unit to set the preset *frequency plane, thereby setting the preset *frequency class. Holy. After receiving the command input unit command, the metrology module m starts accumulating a broadcast time T1. The weight control module 116 determines that Yao Yao plays the hearing protection mode when the preset playing time reaches the preset playing time, and you search the storage unit 13 for the audio document belonging to the preset audio type, μ , ^ ^ The audio file is played by the audio playback system 10. As shown in Figure 6, the hearing protection secret _. 2^ The towel should be the command of the unit wealth when the sound is released, and the element 11 responds to the command to input the audio file ((4) material element 13 (four) fetch and decode and then judge whether the playback time T1 is tired or not s62) o the goods are built into the pre- Set the playing time K1 (step If the micro processing unit u plays the time K1, the silk return time T1 does not reach the preset hometown S61. If the micro processing unit u 11 200803577 determines that the playing time Τι reaches the preset playing time κι, the current record is recorded Play • Status 'Controls the audio playback system 10 to enter the hearing protection mode, searches the storage unit 13 for an audio file belonging to the preset audio type, reads and decodes the coded audio file, and accumulates an interval time Τ 2, The current playing state includes the name of the currently playing audio file, the name of the playlist in which it is located, the current volume, and the like (step S63). Next, the micro processing unit η determines whether the volume limiting function is enabled (step S64). If the micro processing unit u determines that the volume limit function is not turned on, then the amplifier 15 is controlled to maintain the current volume (step S65). The micro processing unit 11 determines that the volume limit function is turned on, and the control amplifier 15 lowers the current volume to the preset volume ν (step S66). The micro processing unit 11 controls the amplifier 15 to amplify and output the corresponding audio file corresponding to the preset audio file. Audio signal (step S67). Next, the micro processing unit 11 determines whether the interval time T2 has reached the preset rest time K2 (step S68). If the micro processing unit 11 determines that the interval time Τ2 has not reached the preset rest time Κ2, the flow Returning to step S67; if the micro processing unit 11 determines that the interval time Τ2 reaches the preset rest time Κ2, resumes playing until the playback a state before entering the anti-fatigue mode (step S69), and the above process continues to execute until the audio is played. The system 10 exits the hearing protection mode or stops playing. Please refer to FIG. 7 together, which is a schematic diagram of the interface for setting the hearing protection mode in the third embodiment. The difference between the third embodiment and the second embodiment 12 200803577 is only The designer of the audio playback system 10 does not provide an interface and function for setting a preset audio type. Set the name of the preset audio type. For example, “protection”, etc., the listener will change the rhythm and the audio type name of the favorite audio file L mark to the name of the preset audio type. Please refer to Figure 8 together. The interface diagram of the hearing protection mode is set in the fourth embodiment. The fourth embodiment is different from the second embodiment only in that the designer of the audio playing system 10 provides an interface and a function for setting a preset playlist, instead of the second implementation. The interface and function of the preset audio type set in the mode. Referring to FIG. 3 together, the fourth embodiment is different from the second embodiment in that the setting module 110 responds to the setting generated by the command input unit 12. The preset playlist is set by preset a command of an audio playlist. The mode control module 116 determines that the play time T1 enters the hearing protection mode when the preset play time T1 reaches the preset play time K1, and reads the audio file in the preset play list from the storage unit 13 to be played by the audio play system 10. In the above-mentioned first to fourth embodiments, the audio playback system 10 may not provide an interface and a function for setting a preset playback time K1, a preset rest time K1, and a preset volume V, and the audio playback system The designer of 10 presets the preset playing time K1, the preset rest time K1, and the preset volume V. In the above first embodiment, the audio playback system 10 may not provide an interface and function for setting a preset audio document, and the preset audio file is preset by a designer of the audio playback system 10. In summary, the hearing protection method for audio playback and the audio playback system with hearing protection function proposed by the present invention can indeed meet the requirements of the invention patent, and file a patent application according to law. However, the above description is only a preferred embodiment of the audio protection system for audio playback and the audio playback system with hearing and protection functions of the present invention, and those skilled in the art will make reference to the spirit of the present invention. Equivalent modifications or variations are intended to be included in the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram of an audio playback system with a hearing protection function of the present invention. Fig. 2 is a schematic view showing an interface for setting a hearing protection mode in the first embodiment of the present invention. Fig. 3 is a functional block diagram of the microprocessor unit of Fig. 1 in the first embodiment of the present invention. Fig. 4 is a flow chart showing a hearing protection method applied to audio playback in the first embodiment of the present invention. φ Fig. 5 is a view showing an interface for providing a hearing protection mode in the second embodiment of the present invention. Fig. 6 is a flow chart showing a hearing protection method applied to audio playback in the second embodiment of the present invention. Fig. 7 is a schematic view showing an interface for providing a hearing protection mode in a third embodiment of the present invention. Fig. 8 is a view showing the interface of the hearing protection mode in the fourth embodiment of the present invention. 14 200803577 [Description of main component symbols] Audio playback system 10 Micro processing unit 11 Command input unit 12 Storage unit 13 Digital analog converter 14 Amplifier 15 Interface unit 16 Display unit 17 Sound output device 18 Detection module 114 Mode control module 116 15