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Past Event: Adding Active Noise Control to Wireless Headsets (Virtual Meeting)

Tom Miller, Sr. Principal Engineer, Knowles Electronics

Tom Miller, Sr. Principal Engineer, Knowles Electronics

April 16, 2020 at 7:30 pm

Location: Zoom Meeting (Virtual; See description for details)

Speaker(s): Tom Miller, Senior Principal Engineer, Knowles Electronics

Zoom:  https://zoom.us/j/969420078pwd=Wjh5TWtReUhYUU96ZXNId1UydGIzZz09

Note that this meeting will be limited to 100 participants.

POST-MEETING UPDATE: A recording of the presentation is now available at https://vimeo.com/411726930

 

A NOTE ON OUR NEW FORMAT:

As you may have noticed, this month's meeting is a bit of a departure from our normal mode of operation. Even though Governor Pritzker has extended the “stay-at-home” order for Illinois until April 30, the Chicago AES Section is indomitable, and will continue our meetings online! 

We will be hosting this meeting using Zoom. The one drawback we are facing is that participation is limited to 100 people. We plan to have a recording of the meeting available online afterwards, however. Please be sure that Zoom is installed on your preferred device prior to the meeting time (app store for iOS/Android, or the meeting link should prompt you to install the app on Mac or PC). You can either use the audio on your device, or call in for the audio with 
these instructions


The meeting will be introduced and moderated by Andrew Bellavia (Director of Market Development, Knowles Electronics). Most participants will have audio and video muted during the meeting. The moderator will un-mute participants in turn to ask a question during the Q&A period. This will be explained again at the beginning of the meeting.

 

ABSTRACT:
Many companies wish to add Active Noise Control (ANC) to their wireless music headsets. ANC makes wearing insert earphones more pleasant, and makes the music easier to hear clearly. Unfortunately, most publications on noise cancelling lack practical information needed to make many key design decisions, and the experts are quite reluctant to share their methods. This presentation will help fill some of those gaps, covering many of the factors needed to provide good noise reduction in small headsets. It will cover the basics of ANC operation, then go onto discuss design factors such as headset acoustics and venting, filter design, and transducer selection. Tom will discuss how to keep an ANC system stable across a variety of wearers, dispelling some myths about latency and stability. He will show how to make good use of balanced armature devices in ANC systems, including how to add a tweeter without disrupting stability. The discussion will conclude with a brief description of transparent pass-through operation and some more advanced ANC techniques that adapt the headset to users and certain use cases.

 

ABOUT THE PRESENTER:
Tom Miller is a Senior Principal Engineer at Knowles Electronics, and has been there for nearly a quarter century. Over those years he has helped to create many of Knowles’ balanced armature receiver designs and has been granted over a dozen patents. More recently he has been studying how Knowles microphones and receivers affect system level issues, such as the control of wind noise pickup and active noise cancellation. Tom is a former Regional Vice President of the AES, and has held every local office except treasurer. Back in a previous century Tom obtained a Bachelor’s degree in Electrical Engineering from the University of Michigan. Upon graduation, he worked for a dozen years as chief technical engineer of Universal Recording, a major Chicago recording studio in its day. After that, he spent a few years working on signal processing for loudspeakers at International Jensen before moving on to Knowles. In his spare time he creates electronic music under the name Shadreaux, having released several albums on Bandcamp (but selling almost none).

 

 

Other Business: From AES HQ: AES Helps "Socially Distancing" Members Worldwide Listen, Learn, and Connect with Discounted Membership Rate Extended Through April 30. To help audio professionals stay connected as the world enters a period of isolation, the Audio Engineering Society is offering 3-month membership for $25, or a 3-month bonus at the standard yearly rate, through April 30, for both new and renewing members. Enrolled audio students receive an even bigger discount with AES Student Memberships starting at just $10 – find out more here.

View Official Meeting Report

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Posted: Tuesday, April 7, 2020

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Past Event: (CANCELLED) For Better or For Worse: Drugs That Can Help or Harm Your Hearing

Dr. Colleen Le Prell

Dr. Colleen Le Prell

March 19, 2020 at 7:30 pm

Location: Shure Incorporated, 5800 W. Touhy Ave, Niles, IL 60714

Speaker(s): Dr. Colleen Le Prell, University of Texas at Dallas

**THIS MEETING WAS CANCELLED DUE TO CDC REGULATIONS REGARDING COVID-19 PANDEMIC**

ABSTRACT:

There are hundreds of drugs that have the potential to induce unwanted auditory side effects including not only tinnitus and hearing loss, but also dizziness and other balance disorders. Two of the drugs best known for inducing hearing loss and tinnitus are the chemotherapeutic drug cisplatin and various members of the aminoglycoside antibiotics family which are used to treat major life-threatening infections. Although the hearing loss induced by these “ototoxic” drugs compromises quality of life, the life-saving benefits of the drugs outweigh the unwanted side effects. In an effort to reduce hearing loss caused not only by these ototoxic drugs but also the hearing loss caused by exposure to loud sound, laboratories around the world have engaged in sustained research activities targeting the development of new “otoprotective” drug agents that ameliorate the harmful effects of noise, cisplatin, and the aminoglycoside antibiotics. In this talk, I will provide a brief overview of how noise, cisplatin, and aminoglycoside antibiotics induce cell death in the inner ear, and how investigational drug agents have protected the inner ear against cell death and hearing loss, preserving auditory function not only in pre-clinical lab studies completed in rodent models but also in early stage clinical trials. Although there are not yet any drugs approved by the US Food and Drug Administration for prevention of hearing loss, multiple promising agents are progressing through the clinical testing process and there is hope that new drug solutions might one day provide a new tool within the hearing loss prevention toolbox.


ABOUT THE PRESENTER:


Dr. Colleen Le Prell is the Emilie and Phil Schepps Professor of Hearing Science at the University of Texas at Dallas, and head of the UTD Communication Sciences and Disorders area, which includes programs in Speech, Language, and Hearing. She has received research funding from the National Institutes of Health, the Department of Defense, several foundations, and industry. Translational research in her laboratory is directed at prevention of noise-induced hearing loss.  She has published more than 65 research articles in peer-reviewed journals and is an Associate Editor for both the Journal of the Acoustical Society of America and the International Journal of Audiology. She contributed 19 book chapters to various texts, and she has edited 3 books.  She is a Past-President of the National Hearing Conservation Association, a current member of the National Occupational Research Agenda (NORA) Hearing Loss Prevention Cross Sector Council, and she has contributed to the World Health Organization “Make Listening Safe” annual consultation annually since 2017.

Other Business: DINNER: Dinner (optional, but please RSVP) will begin at 6:30pm. Contact Brandon Cudequest (bcudequest@thresholdacoustics.com) by Wednesday, March 18th if you would like to join us. Pizza and salad from Lou Malnati’s will be provided. Please let Brandon know if you have a preference for vegetarian, gluten-free, etc. Price is $10 for non-members and $8 for members and students (please bring cash). SAVE THE DATE: Our next meeting will be on Thursday, April 16, 2020. Oliver Masciorotte (Co–Founder & CMO at MAAT Digital) will present on the topic of Loudness & Dynamic Range Metering. Meeting will be held at Shure Inc.

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Posted: Saturday, March 7, 2020

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Past Event: Tour of Symphony Center, home of the Chicago Symphony Orchestra

Charlie Post

Charlie Post

February 18, 2020 at 7:30 pm

Location: Symphony Center, 220 S. Michigan Ave, Chicago, IL 60604

Speaker(s): Charlie Post, CSO Recording Engineer

ABOUT THE HOST:

Charlie Post moved to Chicago in 2014, having accepted a position with the Chicago Symphony Orchestra. He is recording CSO performances for archival, for potential future commercial release on the CSO Resound label, and for the CSO broadcast on the WFMT radio network. The weekly radio broadcast can be heard on WFMT and around the world on CSO.org/radio or SoundCloud, and has upwards of 250k listeners.

The Tanglewood music festival is a large part of his career. For 10 years he spent his summers in the Berkshire mountains of Massachusetts, supervising a team of engineers covering multiple venues, He recorded and mixed sound for hundreds of performances each season, ranging in scope from solo and chamber to full orchestras with choir, as well as jazz groups and rock shows. At the request of the CSO, he changed to a full-year-round position following the 2016 season at Tanglewood.

Alongside working with the Orchestra, he records, edit, and mix classical music for his company PostProductions Audio. He engineers and produces remote recording sessions, and offers live sound mixing services. He has a home studio where he edits and masters recordings, utilizing a high resolution Merging Technologies Pyramix-based digital audio workstation. He uses other software when working on different genres.

Before moving to Chicago, Charlie lived in Miami, mixing live sound at IATSE Local 500 venues such as the Adrienne Arsht Center for Performing Arts, Fillmore Miami Beach at the Jackie Gleason Theater, the Colony Theater and the Miami Dade County Auditorium. He also mixed many shows for the Aventura Arts and Cultural Center and the Miramar Cultural Center / Artspark, assuming the position of head of sound at these venues on an interim basis.

Specialties: Charlie has over 20 years of professional experience in studio engineering and live sound. He worked in NYC commercial recording studios for 10 years, splitting time between engineering and studio management. Although he has been specializing in classical and acoustic music since 2006, he also has years of experience in jazz and rock plus big band, opera, Broadway cast recordings, R&B, etc. Charlie has eclectic tastes in music. Besides engineering, he studied music formally and still plays the saxophone and clarinet. Music is his life!

 

Other Business: SOCIAL HOUR: Social hour will begin at 6:00pm at the Threshold Acoustics office (a short walk from Symphony Center). -- Sandwiches from Jimmy Johns as well as beverages will be provided. Please indicate your attendance at social hour when you RSVP for the tour so that we can get an accurate count for food. Please also indicate if you have a preference for vegetarian, gluten-free, etc. -- Price is $10 for non-members or $8 for members and students (please bring cash). (if you want to partake in the sandwiches, simply attending the social hour and tour is free!) -- Threshold Acoustics is located in the Board of Trade building at Jackson & LaSalle, 141 West Jackson Boulevard. By CTA, use the LaSalle/Van Buren stop and enter the building from the Van Buren St. entrance. -- Parking lots are available with attended parking on Financial Place between Jackson and Van Buren, or on Federal street in the same block. -- Once in the building, proceed to the 2nd floor, and if you have RSVP’d, your name will be your ticket to enter through security. Please bring a valid state or federal ID for admittance into the building. Threshold is on the 20th floor in the Northwest corner of the building.

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Posted: Thursday, January 30, 2020

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Past Event: Recording the GRAMMY-nominated album Liquid Melancholy: Clarinet Music of James Stephenson

Recording the GRAMMY-nominated album Liquid Melancholy: Clarinet Music of James Stephenson

October 30, 2019 at 7:30 pm

Location: Shure Incorporated, 5800 W. Touhy Ave, Niles, IL 60714

Speaker(s): Bill Maylone, Cedille Records & Mary Mazurek, WFMT

DESCRIPTION:
Engineers Bill Maylone and Mary Mazurek will speak about their Grammy-nominated recording Liquid Melancholy: Clarinet Music of James Stephenson released on Chicago’s Cedille Label. They will play excerpts and include details about the planning, microphone choices and placements, editing, mixing, and mastering that went into making the album.

ABOUT THE PRESENTERS:

Bill Maylone has been recording in the Chicago area and beyond for over 30 years, and has been the chief recording engineer for Chicago-based Cedille Records since its inception in 1989. Bill began recording live concerts and spoken-word events for WFMT during its ‘Golden Age’ in the mid and late 1980's. Since then he has engineered almost 200 CD recordings for Cedille, as well as numerous other interesting projects with orchestras and solo artists in the US, Germany, the UK, and the Slovak and Czech Republics. In 2011 and 2012 he received Grammy awards for his work with the renowned new music ensemble Eighth Blackbird.

Mary Mazurek is a GRAMMY-nominated recording engineer. Her nomination was awarded by the Recording Academy in 2018 in the category of Best Engineered Album, Classical. She is also a broadcaster, producer, educator, and artist. Her work is regularly featured on WFMT Radio and WFMT.com. She is a sought after educator and speaker who enjoys contributing in the classroom and on panels and committees within her industry and beyond. She serves as an advocate and role model for women in the recording industry, which presently is less than 5% female. Additionally, she loves sharing her sonic insights across disciplines.

Other Business: Dinner (optional, but please RSVP) will begin at 6:30pm. Contact Brandon Cudequest (bcudequest@thresholdacoustics.com) by Tuesday, October 29th if you would like to join us. Pizza and salad from Lou Malnati’s will be provided. Please let Brandon know if you have a preference for vegetarian, gluten-free, etc. Price is $10 for non-members and $8 for members and students (please bring cash).

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Posted: Thursday, October 17, 2019

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Teri Grossheim's engineering work in industry received a B2B award

Industry recognition for Teri's engineering aptitude while helping build Apple's supply chain under Tim Cook between 2011-2013, where she was a Solution Architect / Systems Engineer at CDW. Teri has been active with the AES Chicago Section since 2007 and has been the webmaster / social media admin since 2014. See URL below for details.

CDW Awarded Prestigious Apple Authorised Enterprise Reseller (AAER) Status


Posted: Thursday, October 3, 2019

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2019-2020 Officer Election Results

The results of the 2019-2010 officer election found here: http://www.aes.org/sections/view.cfm?section=137


Posted: Friday, September 20, 2019

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Past Event: A Practical Guide to Acoustics for Audio Designers

A Practical Guide to Acoustics for Audio Designers

September 17, 2019 at 7:30 pm

Location: Shure Incorporated, 5800 W. Touhy Ave, Niles, IL 60714

Speaker(s): Joseph Myers, President - Kirkegaard Associates

 Joseph Myers will talk about room acoustics, sound isolation, and the control of background noise from a practical point of view, focusing on topics and situations that audio designers are likely to come across. Questions are appreciated!

Joseph Myers is the Principal Acoustics Design Consultant and President of Kirkegaard Associates, and has designed a significant number of the firm’s major projects. This deep experience with performing arts, academic, and worship facilities forms the foundation of his work. An active singer and actor, Joseph also brings a performer’s perspective to his projects. He draws on his background in architectural engineering to develop practical, buildable solutions. He enjoys translating client needs into clear acoustic goals, and then translating those goals into a beautiful, functional, and affordable facility.

Joseph also lectures on acoustic design, having presented to a variety of academic and professional institutions, including the Acoustical Society of America and Yale School of Drama. Joseph has degrees in Architectural Engineering and East Asian Studies from Pennsylvania State University.

Other Business: Dinner (optional, but please RSVP) will begin at 6:30pm. Contact Giles Davis (gilesdavis@motorola.com) by Monday, September 16th if you would like to join us.Pizza and salad from Lou Malnati’s will be provided. Please let Giles know if you have a preference for vegetarian, gluten-free, etc.Price is $10 for non-members and $8 for members and students (please bring cash).

https://mailchi.mp/bf0b5dd0a3b3/chicago-aes-section-meeting-notice-september-17-2019?e=7129ff5be9


Posted: Saturday, August 31, 2019

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Past Event: Joint Meeting w/ ASA: "The Violin and its Discontents: Common Structural and Tonal Problems in Orchestral String Instruments and their Remedy"

April 9, 2019 at 7:00 pm

Location: Stage Two @ Columbia College Chicago, 618 S. Michigan Ave., Chicago IL 60605

Speaker(s): Sanford Field, Top Notch Violins

Stage Two at Columbia College

618 S. Michigan Avenue

Nearby Parking 

Professional luthier Sanford Field will explain the basic structure and acoustics of the violin family of instruments, as well as the technical difficulties frequently experienced by string players and their instruments.  He will then explore and explain the tools and techniques used to diagnose and correct these problems.  Examples of malfunctioning instruments will be daringly explored (and in some cases corrected) live on stage, tools will be displayed and demonstrated, and violins will be played, both as objects of critical listening, and to demonstrate the tangible effects of successful and unsuccessful repair outcomes.  After the talk, questions will be answered and discussed, and the tools and instruments covered in the talk will be available for examination by attendees. 

Sanford Field is a professional luthier and owner/partner at Top Notch Violins, a full-service string instrument shop in Saint Louis, MO. Sanford attended the Red Wing School of Instrument Repair, where he studied violin construction and repair under Lisbeth Butler and John Reed. After completing his training, he worked at Nashville Violins and Saint Louis Strings where his clients included Charlie Daniels, Arvel Bird, and Yonder Mountain String Band's Allie Kral, as well as countless professional musicians, teachers, and students. Prior to his career as a luthier, Sanford received a BFA in painting from the University of Illinois at Champaign/Urbana in 2004, and an MFA in Studio Practice from the University of Illinois at Chicago. In his free time, Sanford also enjoys building furniture, studying HEMA (historic European martial arts), playing violin, banjo, and guitar and spending time with his wife Annie-Rose, and their two rescue dogs, Tallulah and Rowan.

Other Business: The Chicago AES & ASA Sections will provide (and cover the cost) of light appetizers and drinks ahead of the presentation (Starting at 6p)

View Official Meeting Report


Posted: Saturday, March 23, 2019

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Past Event: The Acoustics of Wentz Concert Hall

March 6, 2019 at 7:30 pm

Speaker(s): Richard Talaske, President and Principal Acoustics Consultant, Talaske; Brian Lynch, Fine Arts Director, North Central College

 DIRECTIONS:

Wentz Concert Hall and Fine Arts Center
171 E. Chicago Avenue
Naperville, IL 60540

Please click HERE for detailed directions.

Parking:
Street parking is available around North Central College and there are 3 parking garages in downtown Naperville within walking distance of all of our venues. Please observe all municipal street signs.



DESCRIPTION:
Richard Talaske will be presenting the design of Wentz Concert Hall, a 650-700-seat recital hall for acoustic and amplified music presentations. The Wentz Concert Hall and Fine Arts Center also includes a flexible black box theatre with 150 to 200 seats; instrumental and choral rehearsal halls; a dance studio; art gallery; and numerous practice rooms and classrooms.

Topics he will cover:

  • The use and mis-use of reactive systems in spaces for music halls
  • Running liveliness and its relationship to subjective preference of music halls
  • Applications of these design principals to the design of the Wentz Concert Hall.


THE PRESENTERS:

Richard Talaske, President and Principal Acoustics Consultant, Talaske

Rick Talaske relishes great soundscapes.The engineer-turned-scientist-turned-acoustician routinely explores the world’s great concert halls and theatres. Surveying a hall’s soaring spaces and elegant architectural expressions, his mind translates a room’s geometry, the character of its surfaces, its materials, and spatial dimensions into acoustic possibilities. Analysis, investigation and reverence converge to plumb the space’s possibilities—to take away whatever secrets and lessons it might reveal.Talaske is someone who is never satisfied with what he already knows.

Talaske’s rigorous technical and scientific education resulted in exacting methodology and specific design standards. He is cheerily unapologetic about what might be experienced as “obsession with sound.” People don’t hire a world-class acoustician to achieve only fair results.What surprises some people is his passionate and enthusiastic advocacy for both performers and audience members. As an avid lover of live performance, he strives to create spaces that enhance live events.Talaske serves as project principal and directs all of the work in the office.

Brian Lynch, Fine Arts Director, North Central College - TBA

Other Business: DINNER: Dinner (optional, but please RSVP) will begin at 6:30pm. Contact Giles Davis (gilesdavis@motorola.com) by Tuesday, March 5th if you would like to join us. Pizza and salad from Lou Malnati's will be provided. Please let Giles know if you have a preference for vegetarian, gluten-free, etc. Price is $10 for non-members and $8 for members and students (please bring cash).

View Official Meeting Report

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Posted: Thursday, February 28, 2019

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A Houses of Worship Case Study: Soul City

 

PRESENTER:

Laz Rios, Soul City Tech Director and
Ron Cook, Chicagoland Worship Audio Engineers 


DESCRIPTION:

A Houses of Worship Case Study: Soul City 

Soul City, in the West Loop, is a fine example of well applied tech. They have all the pieces.... Live cameras with IMAG and live stream, wireless ears and mics, well installed line arrays that actually sound good. Virtual Soundcheck. Just enough lighting to be cool. A backstage tech crew with clever ways of communicating. Lots to talk about, all of it a notch above entry level, but implemented so well you might mistake them for having an unlimited budget. 

Laz and his team will give us a tour of their facilities and demonstrate their Virtual SoundChecks. Ron is ideally placed to give those of us new to Worship Audio a sense of how Soul City fits in the larger context. 

THE PRESENTERS:

Laz Rios, Soul City Tech Director

Lazarus Rios is the Technical Director for Soul City Church. Laz spent many years on the road touring as a front man for a metal band, where he gained a love for music, and production. After touring he transitioned into special event management where he spent 5 years building and managing teams. It was in that season that he felt a call into full time technical ministry. Laz joined the Soul City Church Creative Team in March of 2018. He now recruits and trains all production volunteer teams and oversees AVL for weekend gatherings and throughout the building.

Ron Cook, Chicagoland Worship Audio Engineers

Ron Cook is a Front of House, Monitor, and Mix Engineer. For 15 years Ron was a staff audio engineer at Willow Creek Community Church in the Chicago Suburbs. In late 2015 Ron left Willow Creek to form Split The Difference Audio, LLC working with production companies and churches locally in the Chicago area and across the Country as well. In addition, Ron provides studio and live webstream mixing services. Ron is a DPA Microphones Master Club Member and was the 2018 Vice President of the Chicagoland Chapter of the Engineering And Recording Society (EARS)

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Posted: Saturday, February 16, 2019

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