AES is the professional
society for audio engineers. AES membership information is
available at the AES Web Page or
at Detroit Section Meetings. Non-members and guests are always
welcome at Detroit Section AES Meetings.
- June 2008: Jay Risk and Jason Carlock of iBiquity Digital Corporation spoke on HD Radio, In-Band, On-Channel digital broadcasting and the HD Digital Radio Alliance, a joint initiative of radio broadcasters.
- May 2008: Tony Bongiovi of Bongiovi Acoustics spoke at the Motown Historical Museum on the secrets behind the famous “Motown” sound.
Tony gave a presentation on the methods that were used to give Motown recordings that unique sound. The methods gave a small midwestern recording studio an advantage over larger more established studios in New York and LA, and allowed Motown to make its mark on music history. The meeting drew a large turnout including former Motown engineers.
February 2008: David Clark of Alpine Electronics spoke on the continued development of the PTF system. Progress was made in measuring Image Direction using wavelet test signals and onset time analysis. This module reveals many perceived attributes of a sound system and is basis for time alignment of woofers, tweeters and the rear speakers of an upmix surround system.
September 2007: Wade Bray and Randy Stanley of HEAD acoustics, Inc. spoke on the history of binaural technology and the Aachen HEAD.
Tom Nousaine chaired
a discussion on "Near Side Bias in Automotive Audio".
In testing nearly 700 OEM automotive sound systems, over 200
competitive aftermarket automotive sound systems and several
hundred aftermarket loudspeaker systems, Tom found over 95% of
the passenger seat listeners receive a soundstage with images
that are asymmetrically clustered toward the near side of the
car. In the opinion of Mr. Nousaine near side spatial bias is a
nearly universal problem in automotive sound design and
implementation. In considering this issue, individual panelists
presented their interpretation of the situation with methods and
techniques for solving the condition.
June 2007: Tom
Nousaine chaired a discussion on "Near Side Bias in
Automotive Audio". In testing nearly 700 OEM automotive
sound systems, over 200 competitive aftermarket automotive sound
systems and several hundred aftermarket loudspeaker systems, Tom
found over 95% of the passenger seat listeners receive a
soundstage with images that are asymmetrically clustered toward
the near side of the car. In the opinion of Mr. Nousaine near
side spatial bias is a nearly universal problem in automotive
sound design and implementation. In considering this issue,
individual panelists presented their interpretation of the
situation with methods and techniques for solving the condition.
April 2007: Takayuki
Watanabe, Yamaha Corporation, Advanced System Development Center,
Hamamatsu, Shizuoka, Japan, introduced the section Yamaha's
approach to Reverberation Enhancement called Active Field
Control. AFC utilizes acoustical feedback to increase the energy
density of diffused sound, increasing reverberation time.
Clarinetist Kristin Fosdick played to assist in the
demonstration.
February 2007:
Robert B. Schulein, owner of RBS Consultants, and Founding
Partner of HIP Systems LLC, spoke on Binaural Recording: 1932 -
2007 Creating Realistic Sound Fields Using Only Two Audio
Channels. The presentation was followed by three interactive
demonstrations of modern binaural applications.
August 2005: Tony
Bongiovi, noted record producer who got his start at Motown,
spoke on “The History of Sound Imaging – Past and
Present”. Tony gave the section a better understanding of
the position of the record industry relative to multi-channel
sound imaging product offerings. He illustrated his talk with
music clips and a historical outline the technology that has
dictated this position. Tony's paper on the subject is available
from the Detroit Section for the asking. Use the e-mail link at
the top of this page, or e-mail the webmaster at the bottom of
this page.
Jume 2005: Earl
Geddes, GedLee LLC, spoke on room design and loudspeaker design
synergy for small rooms. A new approach is proposed. The speakers
were demonstrated at Earl's Home Theater.
April 2005: Section
Elections & Horizontally Arrayed Center Channel Speakers:
What The Industry Hopes You Won't Find Out About Them - Tom
Nousaine, Contributing Technical Editor to Sound & Vision
magazine.
March 2005: Special
meeting soliciting input on the section's future. Plans were
discussed, a slate of candidates was prepared, and a date set for
the next meeting.
November 2004: Earl
Geddes and Lidia Lee, GedLee LLC, spoke on the perception of
loudspeaker compression driver sound quality. Several loudspeaker
compression drivers were evaluated for perception of frequency
response and distortion. The test was double blind. The results
indicated frequency response differences were audible and
distortion differences were not for the high quality drivers
evaluated.
September 2004:
Jesse Spence, Bully Subwoofers, gave a talk on loudspeaker driver
design basics. Basic physics, design choices, materials, causes
of distortion, and causes of frequency response fluctuations were
be covered. The viewpoint was that of a loudspeaker driver
designer.
May 2004: Joint
meeting with SMPTE: Tim Carroll, Linear Acoustic, presented Audio
for Digital Television. Via metadata, Dolby Digital (AC-3) has
built-in loudness controls, downmix controls, and dynamic range
controls. Assuming that 5.1 channel audio has actually made it to
the encoder, how can you ensure that everything is set correctly?
What happens if metadata is missing or is set incorrectly
(intentionally or otherwise)? How effective are the parameters
anyway? What about mixing local two-channel programming with the
5.1 channels coming from the network- why does the dialogue seem
to disappear? Consumers must be protected from loud and annoying
audio, from jarring image shifts, and from hidden parameters
causing different problems on mono, stereo, and 5.1 channel
receivers.
October 2003: 87
people attended a joint meeting with the soon to be University of
Michigan Section of the Audio Engineering Society: Tour of the
Audio and Video Studios in the UofM Media Union on North Campus
and a Multichannel Surround Seminar by Mike Sokol.
October 2002:
Euphonix Max Air. Euphonix digital audio consoles and equipment,
in a specially equipped truck is outfitted with a 96 channel Max
Air mixing system simulating a local TV station digital Audio
control room with playback of 48 channels of digital audio and 8
video Streams. Joint meeting with SMPTE, MMP, and SBE. Those who
attended learned that the Euphonics truck did not arrive due to a
collision with a deer. An informal discussion replaced the
program.
June 2002: Earl R.
Geddes, GedLee Associates - Advanced Polar Response Measurement -
Using new techniques of radiation modal responses Dr. Geddes
showed how one can reduce the polar response problem by several
orders of magnitude.
May 2002: David
Clark, DLC Design - Spaciousness - The Final Frontier - A further
report on the author's Perceptual Transfer Function measuring
system, numerically evaluating tonal balance, maximum loudness,
distortion and bass capability. This study extended objective
measurement into the category of Spatial Rendition, including
aspects of soundstage size and location, imaging and ambience.
March 2002: Greg
Miller, Sr. VP and Co-Owner of Goldline - The new ISO speech
intelligibility standard, STICis, NFPA 72, STI-PA tones, and
measurement equipment.
February 2002: Doug
Button, Vice President JBL Professional - The EVO Intelligent
Loudspeaker System, and A High Frequency Acoustical Element for
Multi-band Articulated Line Arrays
November 2001: Floyd
Toole, Vice President of Acoustical Engineering, Harman
International Industries, Inc. - Audio Engineering - Science in
the Service of Art
October 2001: Ryan
Dunne, DVD Product Specialist, Roscor Corp. - An Introduction to
DVD Authoring. (Joint Meeting with Detroit SMPTE)
September 2001:
David T. Turner, Vice President of Engineering - ENCO Systems,
Inc. on Engineering High Speed SCSI Disk Systems for Multimedia.
(Joint Meeting with Detroit SMPTE)
May 2001: Mark
Ziemba, Lead Engineer - Panasonic Automotive Systems on Test
Signals for the Objective and Subjective Evaluation of Automotive
Audio Systems. This paper investigated many test methodologies
and uses some new test signals for both objective measurement and
subjective evaluation of vehicle sound system performance. A new
special test signal embraced harmonics. This test signal sounds
similar to an organ note and is spectrally similar to music
signals that have been shown to be helpful in hearing distortion
because of their tonal complexity. Of special interest was
intermodulation distortion because of its audibility and high
annoyance factor. When this signal is introduced without and then
with a low bass warble tone, a large amount of intermodulation
distortion appeared in some vehicle audio systems.
April 2001: Joint
Meeting with SMPTE: Ford Motor Company World Headquarters Media
Auditorium Audio and Video Upgrades: Jim Hegarty - Ford
Communications Network; Kurt Kreszyn - Ford Communications
Network; Chris Hill - Roscor; Devon Tiderington - Roscor
March 2001:
Perceptual Transfer Function - David L. Clark, DLC Design
February 2001:
Measuring the Linear Properties of Loudspeakers - Dr. Earl
Geddes, Visteon
June 2000: Speech
Intelligibility in a Beautiful 150 Year Old Architectural
Environment, Saints Peter & Paul Jesuit Church in Detroit.
Technical presentation and demonstration of the Duran Audio
IVX-6C speaker system. - Roger DuNaier, of Performance Devices,
representative for Duran Audio of The Netherlands.
April 2000: Acoustic
Lever - Theory and Implementation. - Dr. Earl Geddes, Visteon.
February 2000:
Distributed Mode Loudspeakers. - Roland Francis and Adrian Horne,
NXT.
December 1998: Small
Room Acoustics - Dr. Earl Geddes, Visteon.
January 1998: CD-R
Replication Systems - Mark Anzicek, President of ZenTechnologies.
December 1997:
Everything about DVD - Mark Anzicek, President of
ZenTechnologies.
November 1997: PC-AV Convergence & IEEE
1394 - Arnold Krueger & Robert Klacza
