{"id":516792,"date":"2022-03-28T09:41:23","date_gmt":"2022-03-28T13:41:23","guid":{"rendered":"https:\/\/www.rochester.edu\/newscenter\/?p=516792"},"modified":"2022-04-07T19:48:08","modified_gmt":"2022-04-07T23:48:08","slug":"flat-panel-technology-touch-interface-smart-acoustic-devices-516792","status":"publish","type":"post","link":"https:\/\/www.rochester.edu\/newscenter\/flat-panel-technology-touch-interface-smart-acoustic-devices-516792\/","title":{"rendered":"Smart acoustic devices: coming soon to a screen near you?"},"content":{"rendered":"

A Ä¢¹½´«Ã½ project uses flat panel technology to build a more cost-effective device that can also function as a touch interface.<\/h2>\n

Over the past decade, smart devices have become essential components of daily life: doorbells, watches, keychains\u2014even thermostats.<\/p>\n

But many smart devices, such as televisions, laptops, smartphones, and car \u201cinfotainment\u201d dashboard consoles, rely on visual presentation of information. That can be a problem when a person\u2019s visual attention is focused on something other than the device.<\/p>\n

One way to address this problem is to let people use sound or touch for interactions. Of course, adding separate microphones, loudspeakers, and vibration mechanisms using conventional means can impose extra costs and reduce the device\u2019s durability and aesthetics.<\/p>\n

\u201cOur goal is to make a display\u2014or any flat surface\u2014serve as a loudspeaker, microphone, and touch interface.\u201d<\/div>\n

Audio and music engineering major Ben Kevelson \u201922 is part of a Ä¢¹½´«Ã½<\/a> team working to design flat surfaces that can function as acoustic and tactile interfaces\u2014no external microphones or speakers needed.<\/p>\n

The project involves developing alternative technologies for recording and reproducing spatial audio through bending vibrations on flat surfaces ranging from smartphones to video walls. These vibrations allow the smart acoustic surface to serve as a touch interface. The advantage is that the surface is already part of the device, allowing the device to maintain its durability and aesthetics while incorporating these new features.<\/p>\n

Microphone and speaker all in one<\/strong><\/h3>\n

\u201cOur goal is to make a display\u2014or any flat surface\u2014serve as a loudspeaker, microphone, and touch interface,\u201d says project head Michael Heilemann<\/a> \u201918 (PhD), an assistant professor in the Department of Electrical and Computer Engineering<\/a>. \u201cBy vibrating the device itself to produce sound, we can make a good-sounding speaker that fits well in a thin device.\u201d<\/p>\n

\"Ben
Ben Kevelson \u201922. (Ä¢¹½´«Ã½ photo \/ J. Adam Fenster)<\/figcaption><\/figure>\n

The technology uses a flat surface to create and receive sound, making it different from a typical speaker: it can be a microphone and a speaker all in one, and the direction of the sound source can easily be detected.<\/p>\n

The goal of this project is to help improve smart assistants\u2014<\/span>think Amazon Alexa or Google Assistant\u2014<\/span>that use this technology. \u201cThe benefits and applications are pretty broad,\u201d says Kevelson, who works closely with Tre DiPassio \u201919 (MS), a Rochester doctoral student focusing on musical acoustics and signal processing. \u201cBut it has particularly promising applications in home entertainment, consumer electronics, and general music and audio technology.\u201d<\/p>\n

Current smart assistants use between four and eight microphones to detect the direction of the sound source. This new flat panel technology would use only one, making it a cheaper alternative.<\/p>\n

\u201cThe speakers on my TV are bad, and if I buy external speakers, they\u2019re usually clunky,\u201d Heilemann says. \u201cEven a sound bar takes up room. By using the TV panel itself as the speaker, you don\u2019t need external speakers to get good sound out of the TV.\u201d<\/p>\n

An easier way to localize sound<\/strong><\/h3>\n

Heilemann received funding for the project through the National Science Foundation<\/a> in June 2021. Kevelson was a student in Heilemann\u2019s acoustics course and asked if there were any projects he could help with over the summer. \u201cHe was an excellent student, so there was no question he would do well working on this project,\u201d Heilemann says.<\/p>\n

Kevelson worked full time on the project last summer and up to 10 hours per week once the school year began. He was accepted into the master\u2019s program in electrical engineering at Rochester and is working on the project this semester for both his senior design project and graduate research credit. He has helped create massive data sets of recorded audio signals, allowing the team to test their systems and determine how different panel sizes and materials affect recording quality.<\/p>\n

If successful, the technology would localize sound to specific areas of the screen. For example, if someone is on a Zoom call with several others, the audio would come from the area where the person was speaking. \u201cNo more searching your screen to see who is talking,\u201d Heilemann says.<\/p>\n

One potential application in the testing phase involves deploying the flat panel audio technology to make commercial devices more durable. \u201cThey get beaten up pretty good, and a lot of damage can occur due to things like weather, smoke, or anything that can get into the unit and damage the insides,\u201d Heilemann says. \u201cIf you use a microphone or speaker, even in a cell phone, you need some kind of penetration in the unit so the mike can probe the acoustic environment or the speaker can radiate sound.\u201d<\/p>\n

The need for such penetration would be eliminated if the display itself is the speaker, he says, which makes the unit more waterproof and airtight.<\/p>\n

Century-old technology gets a Rochester upgrade<\/strong><\/h3>\n

For his part, Kevelson has been thrilled to \u201cget my hands dirty\u201d with the project. \u201cIt\u2019s very different compared to other things that are research-based in audio,\u201d he says.<\/p>\n

According to Heilemann, the idea of using panels as speakers has been around for nearly a century. \u201cIt never caught on because the sound quality was always much worse than that of conventional speakers,\u201d he says.<\/p>\n

Kevelson is proud to be part of a research team that may finally make some noise in that field.<\/p>\n

\u201cIt was dismissed as completely unviable,\u201d he says. \u201cWe\u2019ve brought it back to life at the URochester, and we\u2019re at the forefront of flat panel technology. It will be exciting to see where it leads.\u201d<\/p>\n

\n

Read more<\/strong><\/h3>\n
\n
\n

\"TheDesigning a world of immersive sound<\/strong><\/a><\/p>\n

Professor Mark Bocko and his research team are using cutting-edge audio technology to build sonically immersive home theaters\u2014and more.<\/span><\/p>\n<\/div>\n

\n

\"StephenThe art and science of sound<\/strong><\/a><\/p>\n

The University\u2019s investment in a state-of-the-art recording studio, control room, mixing rooms, and sound design lab is a major milestone for its audio and music engineering program.<\/span><\/p>\n<\/div>\n

\n

\"WideUndergraduate finds room to explore business, computer science, and an American music icon<\/strong><\/a><\/p>\n

Rochester\u2019s flexible curriculum gives Jacob Rose a chance to research Leonard Bernstein.<\/span><\/p>\n<\/div>\n<\/div>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

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