1、 毕毕毕 业业业 设设设 计计计(论论论 文文文) ( 2 2 20 0 01 1 13 3 3 届届届) 题题 目:目: 自适应耳机的设计与制作自适应耳机的设计与制作 专专 业:业: 电子信息工程电子信息工程 姓姓 名:名: XXXXXX 学学 号:号: XXXXXXXXXXXX 指导教师:指导教师: 职职 称:称: 副教授副教授 填写日期:填写日期: 20132013- -0404- -10 10 第 1 页 摘要 目前,我们用的耳机,功能还比较单一。比如说,当我们用智能手机、平板 电脑等电子产品听音乐、看电影时,由于外界环境的干扰,需要增大、减小音量 时,就避免不了以手动的方式,去调整智
2、能手机、平板电脑等电子产品的音量增 大、减小键,以达到自己期望的音量大小。这在很多情况下,让人们觉得比较麻 烦。 基于以上事实,本文介绍了基于 MSP430F149 的自适应耳机的设计与制作。 本系统经过驻极体采集、TL082 放大、TL082 检波、MSP430F149 片内 AD 四部分 电路,能够自动测量环境噪声,并通过液晶 LCD1602,指示噪声等级;经过数字 电位器 X9313、NE5532 音频放大、MSP430F149 控制器三部分电路能够根据环境 噪声自动调整耳机输出音量,并通过液晶 LCD1602,指示音量等级;系统能够用 按键手动调整音量的等级。 关键词:关键词:MSP4
3、30F149 TL082 NE5532MSP430F149 TL082 NE5532 X9313 LCD1602 X9313 LCD1602 第 2 页 ABSTRACTABSTRACT Currently, we are using headphones, function is still relatively simple. For example, when we use smart phones, tablet computers and other electronic products to listen to music, watch movies, due to the in
4、terference of the external environment, the need to increase and decrease the volume, can not avoid the manual to adjust the smartphone, tablet the volume of computers and other electronic products, lower key, in order to achieve their desired volume size. Based on the above the facts, the article d
5、escribes the design and production. Based of the MSP430F149 adaptive headset. Acquisition of the system after the electret, TL082 amplifier,the TL082 detector,and the MSP430F149 chip AD,four parts of the circuit, can automatically measure ambient noise, and by the LCD1602, indicates that the noise l
6、evel; digital potentiometer X9313, NE5532 audio amplification, MSP430F149 controller the three-part circuit can adjust the headphone output volume automatically based on ambient noise,by LCD1602, indicating the volume level;The system can be able to use buttons to manually adjust the volume level. Key WordsKey Words:MSP430F149MSP430F149 TL082 NE5532TL08