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ECE 4760 Final Project: Phased Array Speaker System
https://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/s2012/tcj26_ecs227/tcj26_ecs227/index.html#:~:text=The%20system%20samples%20a%20standard%20audio%20input%20signal,intensity%20of%20the%20output%20wave%20can%20be%20shifted.
ECE 4760 Final Project: Phased Array Speaker System
https://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/s2012/tcj26_ecs227/tcj26_ecs227/index.html
The system samples a standard audio input signal at approximately 44.1 kHz, and then outputs this signal to each of 12 speakers, each with a variable delay. The idea behind a phased-array is that by changing how the speakers are driven the angle of the maximum intensity of the output wave can be shifted.
US20030185404A1 - Phased array sound system - …
https://patents.google.com/patent/US20030185404A1/en
An array of speakers are fed from a single source of audio frequency sound but each speaker transmits the sound delayed by an amount which is determined by the distance between a particular speaker...
Steering Sound With Phased Array | Hackaday
https://hackaday.com/2014/04/14/steering-sound-with-phased-array/
Phased arrays are usually associated with EM applications, such as radar. But the same principles can be applied to sound waveforms. The math is a little scary, but we’ll walk you through only what...
Phased Array3 AudioText | action
https://www.reachingoutonline.com/phasedarrayaudiotext
Phased Array-Audio Text. Turbine Rotor Inspection -- Overview. 00:00 / 02:00. FAILURE TYPES. 2 Main Categories -- 1) Static Stresses -- 2) Dynamic Stresses. 00:00 / 01:32. PA SCREEN PRINT. Crack in coupler (Hole 15 to 16) -- Extends across 90% of the surface ...
Phased Array Audio Speakers - Page 1
https://www.eevblog.com/forum/projects/phased-array-audio-speakers/
The difficulty with a phase array for sound in air is that the speed of sound is fairly slow (compared to sound in solid things like in biomedical ultrasound). To get adequate beam steering, I need on the order of 10us delay.
SonicSurface: DIY ultrasonic phased array for levitation ...
https://www.youtube.com/watch?v=vAEZvYlUnEM
Do you want to build an integrated 256-channels ultrasonic array? It can be used for acoustic levitation, haptic feedback, directional audio and other cool i...
User Friendly NDE Phased Array - NASA
https://www.nasa.gov/sites/default/files/files/E_Cabral-User_Friendly_NDE_Ultrasound_and_Phased_Array.pdf
• Phased array ultrasonic instrumentation has been around as early as the late 1950s and the beginning of the 1960s, but was restricted to the medical industry in the early days. In the later 1980s and early 1990s, the technology was embraced by a few manufacturers in the nondestructive testing (NDT) industry.
Directional microphone for long range surveillance
Microphone based on a fixed phased array has inherently directional nature, because the amount of audio signal seen by the aperture varies with the direction of the arrival. The term phased refers to the time of arriving of the signal to the acoustic channel, and array is actually multiple elements sharing one and the same flat linear surface.
Directional sound - Wikipedia
https://en.wikipedia.org/wiki/Directional_sound
While a large loudspeaker is naturally more directional because of its large size, a source with equivalent directivity can be made by utilizing an array of traditional small loudspeakers, all driven together in-phase.
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