AES Technical Committee

Loudspeakers and Headphones

Chair:    Steve Hutt      Send Email
Vice Chair:    Juha Backman      Send Email

TCLH - Mission:

The committee works to ensure that the AES membership has the opportunity to learn of relevent new transducer technology as it develops, with an emphasis on sound field generation from loudspeakers and headphones.


Resources & Events

The TC on Loudspeakers and Headphones helps to maintain a Topic Website on Loudspeakers and Headphones.


Areas of Concentration

  • Transducer Design
  • Electronic Processing Techniques
  • Distortion Analysis
  • Measurement Techniques
  • Specifications
  • Digital speakers

Current Areas Of Work

  • Specifications Discussion:
  • Exploring terms, methods & definitions of power ratings. - a big topic

Recent/Planned Activities

  • AES Technical Committee on Loudspeakers and Headphones
  • Meeting Notes:
  • AES 140th Paris, 5/June/16 11:00 am Salon – Palais room 363
  • Chair: Steve Hutt
  • Attendees:
  • Mark Dodd - GP Acoustics
  • Jack Oclee-Brown - GP Acoustics
  • Michael Hedges - Jaguar Land Rover
  • Michael Turner - Neidec Servomotors, elecroacoustic consultant.
  • Martial Rousseau – Bowers & Wilkens
  • Chris Struck - CJS Labs, standards Director Acoustical Society America
  • Todd Welti - Harman
  • Patrick Hagerty – Dynaudio, co-chair Conference on Headphones
  • Hans Van Maanen, Temproal Coherence
  • Marian Leibec, Klippel
  • Trends:
  • Micro speakers
  • Applications for micro speakers continue to expand with high mechanical demands
  • rocking modes are an issue with single suspension transducers
  • Compression drivers with flat suspensions suffer rocking.
  • Klippel has been investigating & developing analysis & solutions
  • Headphones
  • Trend in measurements and correlation to subjective preference:
  • - the market is 'getting more grown up'.
  • Some companies (perhaps not audio companies) may be unaware that there are performance targets.
  • Many do know, AKG, Etymotic, Beyer etc.
  • Some are looking at the target curve to develop company.
  • Some companies may be embracing the Harman target curves - maybe even faster than Harman brands.
  • Apps for headphones are appearing:
  • From simple EQ apps to BiLi binaural HRTF management from Orange, BBC etc.
  • Workshop Concepts:
  • Time domain measurement and analysis.
  • Hans van Maanen has volunteered to chair.
  • will organize for AES 142nd, Berlin
  • Power Capacity
  • Power Capacity of Loudspeakers (drivers & systems) is a complex topic.
  • A first workshop might only explore questions.
  • How can the AES2-2012 loudspeaker driver test be better explained in the industry. i.e. why is this test not relevant to loudspeaker systems?
  • What kind of power capacity information is important to system designers and users.
  • Can programme material be organized into some kind of definitions?
  • Etc. etc.
  • Conferences:
  • 2016 AES International Conference on Headphone Technology
  • Dates: August 24-26, 2016
  • update by chair: Patrick Hegarty
  • 40 submissions, chose 30 + 10 posters
  • 19 demos
  • Standards Liaison:
  • EIA 60268-(5) update
  • The first IEC standard project IEC 60268-21 - Sound System Equipment - Loudspeakers - Acoustical (Output Based) Measurements is running and an international working group has been created. The aim is to revise the draft and to circulate it to IEC CO for CD circulation. Valuable feedback has been already provided and more is coming from the national committees.
  • The German national committee provides a proposal for a second related standard document IEC 60268-xxx - Sound System Equipment - Loudspeakers – elekctrical and mechanical Measurements.
  • A summary on both standards will be presented during the next AES convention in LA
  • New Topics:
  • Chris Struck introduced the topic of “Measurement Uncertainty”
  • IEC boilerplate has a very general description about measurement uncertainty. Chris is working on expanding it. ISO 98 guide.
  • Next Meeting:
  • AES 141st, Los Angeles 29Sept-2Oct/2016


Meeting Report:

These documents do not necessarily express the official position of the AES on the issues discussed at these meetings, and only represent the views of committee members participating in the discussion. Any unauthorized use of these publications is prohibited. Authorization must be obtained from the Executive Director of the AES: Email, Tel: +1 212 661 8528, Address: 551 Fifth Ave., Suite 1225, New York, New York 10176, USA.

2016-6-5     TC-LH 140th Meeting Notes.
Description: Meeting notes from the TCLH meeting 5/June16 - Paris

2015-11-2     AES 139th TCLH Meeting Notes
Description: TC Loudspeakers & Headphones Meeting notes from the 139th, New York, 31 October 2015.

2015-6-10     TC-LH 138th Meeting Report
Description: TC Loudspeakers & Headphones Meeting notes from the 138th, Warsaw, May 2015

2013-5-7     AES 133 TCLH San Francisco minutes
Description: Meeting minutes from the Technical Committee meeting on Loudspeakers and Headphones, Held in San Francisco on October 28, 2012.


Other:

2013-5-13     AES Tutorial Diagnostics on irregular loudspeaker defects
Description: AES Tutorial Diagnostics on irregular loudspeaker defects, WOLFGANG KLIPPEL, Rome 2013


Committee Members

 Allan Phillips  Bob Zurek  David Clark 
 David Dage  Don Keele  Doug Button 
 Marshall Buck  Peter Mapp  Earl Geddes 
 John Stewart  John Vanderkooy  Mark Ziemba 
 Juha Backman  Jim Stratman  Giles Davis 
 Jason Linse  John Busenitz  Richard S Stroud 
 Edgar Kirk  Gottfried Schmid  Francesco Tordini 
 Richard Small  Stanley Lipshitz  Tom Nousaine 
 Erling Sandermann Olsen  Mark Dodd  Steve Hutt 
 Scott Orth  Alex Voishvillo  Aldoshima Irino 
 Neil Harris  Simone Koo  Wolfgang Klippel 
 Ryan Mihelich  Michael Howes  Roberto Magalotti 
 Brian Sterling  Timo Esser  Robert Franks 
 Tim Mellow  Kenneth Deetz  Alan Trevena 
 Florian Konig  Brian Fligor  Ken Kantor 
 Sean O'Brien  Mattia Cobianchi  Robert Klacza 
 Wendy Mittelstadt  Hans van Maanen  Robert Baum 
 Murilo Alvares  Ron Ajemian  Michael Hedges 
 J M Woodgate  Laurie Fincham  Philippe Herzog 
 Christopher Struck  David Carlstrom  Peter Brown 
 David Prince  Paul Barton  Ronald Sauro 
 Charles Hughes II  Richard Little  Geoff Hill 
 Rachel Cruz  Roger Schwenke  Michael Turner 
 Paul Apollonio  Karl Kerstein  Michael Santucci 
 Patrick James Hegarty  Pat Dennis  CheahHeng Tan 
 Alexander Lindau, Dr.  Jesse Lippert  Colin Bigland 

To request membership in this Technical Committee please email the Chair by using the link above.

 
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