3-D Sound and Spatial Audio MUS_TECH 348. Stereo Loudspeaker Reproduction.

Slides:

Advertisements

Similar presentations

Researches and Applications for Automotive Field Andrea Azzali, Eraldo Carpanoni, Angelo Farina University of Parma.

Advertisements

1 3D sound reproduction with “OPSODIS” and its commercial applications Takashi Takeuchi, PhD Chief Technical Officer OPSODIS Limited Institute of Sound.

Spatial Perception of Audio J. D. (jj) Johnston Neural Audio Corporation.

Modulation: CHORUS AND FLANGE  Just as a chorus is a group of singers, the chorus effect can make a single instrument sound like there are actually.

3-D Sound and Spatial Audio MUS_TECH 348. Psychology of Spatial Hearing There are acoustic events that take place in the environment. These can give rise.

Interference of Sound Waves

Auditorium Acoustics Chapter 23. Sound Propagation Free field sound pressure proportional to 1/r SPL drops 6 dB with every doubling of distance. Indoors.

3-D Sound and Spatial Audio MUS_TECH 348. Wightman & Kistler (1989) Headphone simulation of free-field listening I. Stimulus synthesis II. Psychophysical.

3-D Sound and Spatial Audio MUS_TECH 348. Environmental Acoustics and Computational Simulation.

Reflections Diffraction Diffusion Sound Observations Report AUD202 Audio and Acoustics Theory.

ELEC 407 DSP Project Algorithmic Reverberation – A Hybrid Approach Combining Moorer’s reverberator with simulated room IR reflection modeling Will McFarland.

AES 115 th Convention Tutorial Session All About Equalizers (for live sound use) Dennis Bohn Don Pearson Bruce Jackson Rane Ultrasound Lake.

Back to Stereo: Stereo Imaging and Mic Techniques Huber, Ch. 4 Eargle, Ch. 11, 12.

3-D Sound and Spatial Audio MUS_TECH 348. Cathedral / Concert Hall / Theater Sound Altar / Stage / Screen Spiritual / Emotional World Subjective Music.

Live Sound Analog Mixing Console. Live Sound Analog Mixing Consoles Come in many different sizes and configurations for different applications Come in.

Virtualized Audio as a Distributed Interactive Application Peter A. Dinda Northwestern University Access Grid Retreat, 1/30/01.

Project Presentation: March 9, 2006

1 Manipulating Digital Audio. 2 Digital Manipulation  Extremely powerful manipulation techniques  Cut and paste  Filtering  Frequency domain manipulation.

STUDIOS AND LISTENING ROOMS

1 Dong Lu, Peter A. Dinda Prescience Laboratory Computer Science Department Northwestern University Virtualized.

An Alternative design for loudspeakers using the non- linear interaction of sound waves Seminar Ratish J. Punnoose.

Binaural Sound Localization and Filtering By: Dan Hauer Advisor: Dr. Brian D. Huggins 6 December 2005.

Filtering Separating what you want from what you have.

3-D Sound and Spatial Audio MUS_TECH 348. Multi-Loudspeaker Reproduction: Surround Sound.

Philip Coleman, Alice Duque, Philip Jackson, Marek Olik University of Surrey, Guildford, UK BBC Audio Research Showcase 2013 start The binaural.

3-D Sound and Spatial Audio MUS_TECH 348. What are Some Options for Creating DTFs?

L INKWITZ L AB Accurate sound reproduction from two loudspeakers in a living room 13-Nov-07 (1) Siegfried Linkwitz.

1 Recording Fundamentals INART 258 Fundamentals of MIDI & Digital Audio Mark BalloraMark Ballora, instructor 1.

Inspire School of Arts and Science Jim White. Equalization (EQ) Equalization means boosting or cutting specific frequencies within an audio signal. A.

Making all the right connections Signal Flow 101.

 Sound is a form of energy similar to light, which travels from one place to another by alternately compressing and expanding the medium through which.

Spatial Perception of Audio vs. The Home Theatre James D. Johnston Chief Scientist, DTS, Inc.

ECE 598: The Speech Chain Lecture 5: Room Acoustics; Filters.

Improved 3D Sound Delivered to Headphones Using Wavelets By Ozlem KALINLI EE-Systems University of Southern California December 4, 2003.

1 4-Integrating Peripherals in Embedded Systems (cont.)

Monaural Input Channel An in-depth look at a single channel on the Mixing Console in the Main Stage.

EELE 5490, Fall, 2009 Wireless Communications Ali S. Afana Department of Electrical Engineering Class 5 Dec. 4 th, 2009.

Mechanical Waves and Sound

LINKWITZ LAB What are the On-axis & Off-axis

Issac Garcia-Munoz Senior Thesis Electrical Engineering Advisor: Pietro Perona.

Rumsey Chapter 16 Day 3. Overview  Stereo = 2.0 (two discreet channels)  THREE-DIMENSIONAL, even though only two channels  Stereo listening is affected.

If you speak one word at the microphone at a level of 80 dB and the loudspeaker returns that word to the microphone at 80 dB, then you can go home. The.

1AES tutorial, 2008 Small Room Acoustics Ben Kok Nelissen ingenieursbureau

3-D Sound and Spatial Audio MUS_TECH 348. Main Types of Errors Front-back reversals Angle error Some Experimental Results Most front-back errors are front-to-back.

Developing a model to explain and stimulate the perception of sounds in three dimensions David Kraljevich and Chris Dove.

Timo Haapsaari Laboratory of Acoustics and Audio Signal Processing April 10, 2007 Two-Way Acoustic Window using Wave Field Synthesis.

L INKWITZ L AB S e n s i b l e R e p r o d u c t i o n & R e c o r d i n g o f A u d i t o r y S c e n e s Hearing Spatial Detail in Stereo Recordings.

 Sound effects  Our project  Background & techniques  Applications  Methodology  Results  Conclusion.

Maximising the acoustics of your meeting room

Effects. Effects in Music n All music that is recorded or amplified relies on effects to enhance certain characteristics of the sound. n Guitarists typically.

NTSC SYSTEM. INTRODUCTION It’s the national television system committee. Analog television – used in parts of North and South America,Myanmar,S.Korea,parts.

Crossover-Mania A Tale of Two Timings System configuration used for these measurements (No acoustic elements) EQ  DelayPolarity   X-Over Sum Input.

Destructive Interference – Active Noise Reduction (ANR) Koss Noise Reduction Headphones.

Time Based Processors. Reverb source:

What we are not going to do ×Tell you if your speakers are in the right spot ×Sell you a brand of speakers ×Listen for you.

Range & Doppler Accuracy by Ramya R.

3-D Sound and Spatial Audio MUS_TECH 348. What do these terms mean? Both terms are very general. “3-D sound” usually implies the perception of point sources.

What is stereophony? Stereos = solid (having dimensions: length width, height) Phonics = study of sound stereophony (stereo) is an aural illusion – a.

3D sound reproduction with “OPSODIS” and its commercial applications

Brought to you by Mike and Mike Inc.

Addressing the 3 Rs of Acoustics With CATS Packs

Volume 62, Issue 1, Pages (April 2009)

Hearing Spatial Detail

Volume 62, Issue 1, Pages (April 2009)

Dennis Bohn Don Pearson Bruce Jackson Rane Ultrasound Lake

Intensity Stereo Uses only differences in intensity between two channels to create stereo image Two microphone diaphragms are placed as close together.

Recap In previous lessons we have looked at how numbers can be stored as binary. We have also seen how images are stored as binary. This lesson we are.

3-D Sound and Spatial Audio

Now that we can store audio with high resolution, what will it take to reproduce it with high accuracy? 10/29/2019

Presentation transcript:

3-D Sound and Spatial Audio MUS_TECH 348

Stereo Loudspeaker Reproduction

Intensity Stereo Side Image

Intensity Stereo Center Image

Typical Pop/Rock and Classical Spatial Distribution

Off-Center Listening

“Precedence Effect”

Mono Compatibility

Why can’t we just reproduce binaural recordings over loudspeakers?

Binaural Recording with Loudspeaker Reproduction

Stereo Loudspeaker Reproduction Creates Notch at 2kHz

How to Eliminate Crosstalk? 1) Use a baffle

2) Use out-of-phase signals

180° Out of Phase Signals

180° Out of Phase Loudspeakers

Alternatively

How to make Loudspeaker Reproduction Transparent?

3) Crosstalk Cancellation from Manfred Schroeder (late 1950s) Exact Solution Make loudspeaker listening more like headphones All sounds externalized

Schroeder’s Cross-talk Cancellation System

One Step at a Time: Equalization of Loudspeaker Response EQ Filter Result

But…

Introduce cross-talk cancellation signal:

But… There is crosstalk for the crosstalk cancellation signal!

Full Cross-talk Cancellation Solution:

“Sweet Spot”

The Problems? 1.Off-center positions. Only one sweet spot. 2.Individual Differences. Listener’s HRTFs, including H 30 and H 330, don’t match. 3.High frequency cancellation. Wave lengths are so short that very slight shifts in position throw everything off. 4.1/H 30. Inverting the notches creates big peaks that probably don’t match the listener. 5.Room Acoustics. Indirection sound reaches the listener.

Off-Center Seating in Larger Spaces Good Each seating position has unique time of arrival delay and level differences. Only the center seats can provide spatial imagery.

Off-Center Seating in Larger Spaces The separation of the stereo loudspeakers creates different ranges of differences for time of arrival delay.

Off-Center Seating in Larger Spaces Delayed signal from loudspeaker can create a wide range of subjective impressions!

Off-Center Seating in Larger Spaces The range of time of arrival delays for typical loudspeaker separatations puts the delay in the range of these different subjective impressions

Loudspeaker Reproduction in Natural Environments Loudspeakers themselves create indirect sound.

Frequency and Time Response of Loudspeaker in an Empty Room Impulse response and amplitude response from the loudspeaker to the listener in an empty test room.

Figure 2 shows change with a few absorption panels in place.

More,

Figure 6 finally shows a rooms with only slight indirect sound between the loudspeaker and the listener.

Figure 6 impulse response and amplitude response.