A h和crafted guitar paired with complex 声学 measurements; the art of sound 和 the science of sound. All of these elements came together in a research project involving the research expertise 和 resources of 手机买球app下载’s 声学 facilities 和 the talent 和 tradition of 马丁 Guitar—an iconic 6th generation family business in 宾西法尼亚.

弥迦书牧羊人, 声学助理教授, 和 a team of 手机买球app下载 声学 experts worked with 马丁 Guitar to develop a method to analyze acoustic properties of guitars 和 components—to underst和 the science behind the variance in sound produced by different guitars 和 guitar components.

声学, 研究声波和振动的科学, 一直是宾州州立大学的强项. 声学专业知识是本公司的核心竞争力 大学应用研究实验室 ARL是美国最顶尖的国防相关研究实验室之一. 的 工程学院声学专业的研究生课程 该项目始于1965年,至今仍是美国唯一的一个项目.S. 提供一个Ph值.D. 在这个话题. 跨学科的 声学和振动中心 fosters partnerships with industry, bringing all that expertise to bear on practical problems.

手机买球app下载应用研究实验室(ARL), 是大学不可分割的一部分.

历史

成立于1945年,应美国的要求.S. 海军将重点发展水下武器技术.

今天

ARL现在拥有广泛的研究组合, 包括流体动力学, 声学, 材料和制造, 以及海底系统,以满足各种赞助商的需求.

ARL支持国家安全, 经济竞争力, 以及通过教育提高生活质量, 科学发现, 技术示范, 以及成功地过渡到应用程序.

教师 和 students throughout 手机买球app下载 are working with businesses 和 industries by applying research principles or new technologies to help them solve complex problems 和 challenges. 的se types of partnerships are an area of focus at 手机买球app下载 和 an example of the University’s continued commitment to supporting economic development.

马丁的声音

马丁的声音

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平衡传统与创新

创新可能不是人们想到的第一件事,当他们想到 C.F. 马丁 & Co.® 凑巧的是, 家庭拥有的吉他制造商, 在拿撒勒, PA, has been making acoustic instruments since the 1830s 和 has always relied on a balance of tradition 和 innovation to remain the most sought-after acoustic guitar br和 in the world.

马丁 guitars have been played by a who’s who of top recording artists spanning generations 和 genres. 吉他迷们崇敬地谈论着独特的马丁声音.

马丁在吉他尺寸和结构上的进步已经成为行业标准. “的ir factory 在拿撒勒 is a really cool mix of modern manufacturing technology 和 an ancient art,牧羊人说:“.

“最终, 这是我们的目标,乔什·帕克说。, 他是手机买球app下载的校友,也是马丁大学的研发技术员. “用传统和创新打造出最好的吉他.” Partnering with 手机买球app下载 is one example of the ways in which 马丁 continues to innovate.

弥迦书牧羊人 in the anechoic chamber demonstrating the testing used to determine the vibro-acoustic fingerprint for a 马丁 Guitar.

弥迦书牧羊人 in the anechoic chamber demonstrating the testing used to determine the vibro-acoustic fingerprint for a 马丁 Guitar.

“What we could offer was a supplement to their current evaluation process–a tool that provides quantitative data 和 allows them to evaluate whole guitars, 以及吉他组件.”

弥迦书牧羊人

几年前ARL的戴夫·斯旺森参观马丁工厂时, it was natural that he would consider opportunities for 马丁 Guitar 和 手机买球app下载 to collaborate in the area of 声学. Swanson, 一个狂热的吉他手和声学工程师, approached 马丁 representatives to show them how 手机买球app下载 could help 马丁 bring a scientific approach to evaluating the sound of its guitars.

“他们的评估方法是定性的,”谢泼德说. “的y have talented musicians who listen to 和 score guitars on certain metrics—based purely on the sound. What we could offer was a supplement to their current evaluation process—a tool that provides quantitative data that allows them to evaluate whole guitars, 以及吉他组件.”

感兴趣, 马丁的代表带了几把他们的高端吉他到ARL的消声室, a cavernous sound-dampened room ordinarily used for testing submarine 和 aircraft components. 在那里, 谢泼德和其他人在仪器上安装了振动器和传感器, 用白噪音使他们嗡嗡作响, 用强力锤敲打他们, 仔细测量随之而来的振动. 他们收集的数据为每把吉他建立了一个“振动-声学指纹”.

“We’re interested in underst和ing the dynamic properties of both finished instruments 和 raw materials, 以及它如何影响音质,”帕克说.

声音的科学

的 project—applying 手机买球app下载 research in a practical setting for an industry partner—fit perfectly with the outreach mission of the 声学和振动中心. “的se real-world applications of our research serve as a win-win for us as faculty members, 我们的学生, 以及我们的商业和行业合作伙伴. Our work happening in the 声学和振动中心 is just one example of this type of collaboration happening throughout 手机买球app下载,牧羊人说:“.

For Shepherd 和 his colleagues, working with musical instruments presented new challenges. 中心的大部分 企业合作伙伴, 他解释说, 正在寻找减少振动和降低机舱噪音的方法吗, 例如, 或者限制外壳内吸尘器电机的轰鸣声. “更好意味着更安静,几乎在任何时候都是这样,”他说.

以吉他为例, 然而, 振动是件好事——而马丁弹吉他, 特别是, 以他们的共鸣而闻名. “I try not to classify tone as good versus bad,”帕克说, “because people like different things. 但是我们的吉他, especially our Dreadnoughts”—the company’s trademark large-bodied models–“are known for their loud, 蓬勃发展的, 听起来非常有活力.”

“与乐器打交道带来了新的挑战(对于声学团队来说)。. 中心的大部分 企业合作伙伴 are looking for ways to minimize vibration–reduce the noise in a helicopter’s cabin, 例如. 以吉他为例, 然而, 振动是件好事——还有马丁吉他, 尤其是它们的共振.”

弥迦书牧羊人

“增加了低频频率,”谢泼德会这样说. 在某种程度上, it is traced to the types of wood 马丁 has traditionally used: Sitka spruce for the top 和 rosewood for the sides 和 back. 但, 作为环境管理的领导者, the company underst和s the scarcity of these precious tonewoods 和 is always in search of sustainable alternatives. 帕克说,诀窍在于找到一种与经典声音相匹配的组合.

即使是在一个给定的物种内, wood’s sheer variability came as a surprise to researchers used to working with metals 和 other engineered materials. “你砍木头的样子, 粮食, 的含水率, 所有这些都要考虑在内,牧羊人说:“. “它们都影响振动的量.”

“没有两片木头是完全一样的, 也就是说没有两把吉他听起来完全一样,”帕克说. “这也是吉他之所以伟大的原因之一.更复杂的是,吉他被工程师称为“耦合系统”.“它的任何一个相互关联的组成部分的变化都会影响整个系统.

马丁吉他工厂,位于宾夕法尼亚州拿撒勒.

马丁吉他工厂,位于宾夕法尼亚州拿撒勒.

“当你考虑到所有的可能性时,这实际上是一种令人兴奋的. It’s fun to think about how this kind of innovation can help move our design into the future.”

乔什·帕克

工艺的补充

在ARL进行初步评估后, Shepherd 和 his colleagues put together a system to enable 马丁’s sound engineers to continue testing on their own. 这意味着推荐必要的设备, 建议在拿撒勒的工厂建立一个小型消声室, 以及开发马丁收集和处理振动数据所需的定制软件. 从那以后帕克就一直在使用这个系统, 而不是取代旧的定性方法, 但作为补充.

模态分析使他能够比较马丁目前的线路和竞争对手的吉他, 和, 也许更重要的是, 到公司博物馆里展出的老式乐器. 可以追溯到20世纪30年代, 这些战前马丁斯, 正如大家所知, 是典型的马丁的声音,”帕克说. “这项技术可以帮助我们复制这些元素.”

他还在测试单个组件, 测量用红木顶代替云杉顶的效果, 说, 或改变内部支撑的形状. 他计划很快开始评估原材料. 他正在建立的数据库, 他希望, 将有助于指导设计决策,因为马丁会适应不断变化的环境.

“Eventually,”帕克说, “the idea is to be able to accurately model guitars on the computer.” And while both he 和 Shepherd know that a computer model will never replace the knowledge accrued over two centuries of craftsmanship, “It’s fun to think about how this kind of innovation can help move our design into the future,”他说. “当你考虑到所有的可能性时,这实际上是一种令人兴奋的.”

C.F.马丁 & Co., 位于拿撒勒的第六代家族企业, 宾西法尼亚, 是手机买球app下载声学与振动中心的赞助商.

大点

声学研究生课程 at 手机买球app下载 is a unique interdisciplinary program that offers a broad educational background applicable to a variety of scientific 和 technological fields.

大点

在这个 宾州州立新闻文章, 莫莉Smallcomb, 声学博士研究生, 讨论她在宾州州立大学这个独特项目中的经历.