Kirkegaard & Associates Consultants in architectural acoustics, audio/video systems and mechanical noise isolation. Specializing in performing arts spaces, concert halls, churches and universities. http://www.kirkegaard.com/

Mc Squared System Design Group, Inc. Consulting firm providing sound system design, audio/video presentation system design and acoustical design services . http://www.mcsquared.com/

Theer & Associates Acoustic consultants specializing in architectural acoustics with an emphasis on electro-acoustics. The firm was established to provide consulting services to architects, owners, and contractors. http://theer.com/

Sandy Brown Associates Consultants in acoustics, noise and vibration, audio-visual systems, theatre and conference venues, and specialist architecture. http://www.sandybrown.com/

David L. Adams Associates, Inc. Architectural, multi-media and environmental acoustical consultants provide projects, profile, contacts and fu facts. Offices in Denver and Kailua, Hawaii. http://www.dlaa.com/

A.D.S.Ltd Acoustic, noise and vibration consultants. http://www.acousticdesignservices.co.uk/

White Mark Ltd. Acoustic and technical designers of pre and post production studios for the audio, video and broadcast industries. http://www.whitemark.com/

Engineering Dynamics International Missouri consultants in architectural acoustics, noise, HVAC vibration control, sound testing, audio and video systems, and performance lighting. Specializing in churches, schools, offices, theaters and auditoriums. http://www.edi-stl.com/

Robert A. Hansen Associates Consultants in acoustics and audio video systems design. Based in New York, New York. http://www.hansenacoustics.com/

Marshall Day Acoustics Acoustics and noise engineering consulting firm that provides acoustical, environmental noise, and noise control design services, including concert hall and auditorium design, environmental noise assessments, and building services and industrial noise control. http://www.marshallday.com/

Renzo Tonin & Associates Pty Ltd Specialising in building acoustics, environmental acoustics, workplace acoustics and legal services. http://www.rtagroup.com.au/

Encore Design Group Providing consulting and design services in acoustics, sound systems, lighting systems, and rigging systems for performance and assembly facilities including theatres, concert halls, churches, museums and art centers. http://www.encorestage.com/encoredesign

Avl Designs Consultants For Acoustical, Sound, Lighting, Stage Rigging And Video Design firm specializing in acoustics, sound system design, theatrical lighting and rigging, and industrial noise control. http://www.avldesign.com/

HGC Engineering Consultants specializing in noise control, vibration isolation, acoustics. Deals with architectural acoustics and new product design. http://www.hgcengineering.com/

Orpheus Acoustics Acoustical consultants specializing in architectural acoustics including noise and vibration control for auditoriums, churches, synagogues, and other critical listening spaces. http://www.orpheus-acoustics.com/

Sound Scene Acoustics Design and consulting, architectural acoustics, noise control, and audio-visual systems, in the USA and Southeast Asia. Clients range from churches to rock opera houses. http://home1.gte.net/mjarzo/index.htm

Sonic Element Specializing in the acoustic design of recording studios, auditoriums and buildings for performing arts. http://www.sonicelement.freeserve.co.uk/

Martin Newson & Associates Acoustical consulting services including architectural acoustics, building services, noise and vibration control, environmental acoustics and troubleshooting. http://www.newsonacoustics.com/

Pelton Marsh Kinsella Dallas based consultants in acoustics, theatre, television and audio/visual design. http://www.pmkconsultants.com/

Acoustic Dimensions Provides a coordinated approach that includes room shaping, acoustics, audio, video and lighting design. http://www.acousticdimensions.com/