Studio Acoustics

Recording Studio, Bloomfield College, Bloomfield, New Jersey · Ostergaard Acoustical Associates assisted Fallon Pacheco Architects and Roxbury Engineering with the design of a recording studio at Bloomfield College, part of an addition and renovation to the Creative Arts and Technology facility.

  • Sound Isolating Constructions: Sound isolation for the Recording Studio was the most significant concern for this project. The Recording Studio is intended to be used separately and simultaneously with its associated horizontally-adjacent Control Room, as well as simultaneously with a Multi-purpose Room located above the recording studio. Significant constructions were developed to address these concerns.
  • Between the Control Room and the Recording Studio, the primary separating partition is a 3-layer construction. The middle layer is CMU. Fastened to each side of the CMU are resilient isolation clips securing metal studs to the CMU while avoiding rigid connections. The partition is finished on each side with layers of gypsum board, with insulation in the cavity. Inset into this special partition construction is a large, non-operable sound-isolating window assembly, utilizing 12-inch-deep airspace. Noise reduction through the window is excellent, measuring 50+ dB at mid-frequencies.
  • Between the Control Room / Recording Studio and the Multi-purpose Room above, the separating construction comprises a gypsum board ceiling supported on spring isolation hangers. This special ceiling is suspended from the concrete slab above. Ductwork and piping in the Control Room and Recording Studio are below the special ceiling construction in order to increase room volume and minimize necessary penetrations through the ceilings. Measured noise reduction through the floor/ceiling construction is superb, measuring 70+ dB at mid-frequencies.
  • HVAC Noise and Vibration Control: A challenging goal of NC-15 background sound levels was set for the Recording Studio and Control Room. Through the use of extremely low air speeds, selection of quiet diffusers and grilles, and the advantageous location of these rooms in the basement (far from the rooftop air handler), measurements in the finished spaces confirm that this remarkably low level of background sound is achieved. The HVAC design for these spaces also incorporates numerous silencers to control “cross-talk” through ductwork, so that the high degree of sound isolation afforded by partitions is not compromised.
  • Room Acoustics: Three of the four Recording Studio corners avoid 90-degree angles in plan, which promotes even distribution of reflected sound. The Recording Studio ceiling utilizes surface-mounted sound diffusers. Recording Studio walls incorporate variable acoustics panels; these expose sound-absorbent material to the room when open, but expose solid wood to the room when closed, allowing customization of the recording studio for different recording desires. The special sound-isolating ceilings in the Recording Studio and in the Control Room are finished with spray-applied sound absorption to assist with overall control of reverberation.

Bruton Video Production Facility, Colonial Williamsburg Inc., Williamsburg, Virginia · The Bruton Heights Production Facility enables Colonial Williamsburg Inc. to produce high quality educational videos, including reenactments, for use in their exhibits. The facility resulted from the conversion of an abandoned high school. A sound stage, control rooms, and audio studios were created within the former gymnasium. The auditorium was modified for editing and presentation use.

Ostergaard Acoustical Associates: designed the interior acoustics; selected constructions to sound isolate between spaces and control noise penetration from an adjacent railroad; and, worked interactively with the mechanical engineer to assure quiet HVAC systems. Contact: Mr. Richard L. McCloney, Jr., Colonial Williamsburg Productions, 757-220-7149.

Video Studio, National Center for State Courts, Williamsburg, Virginia · The new video area consists of a tiered distance learning classroom/studio, control rooms, an announce booth, and simultaneous translation rooms. The challenge for Ostergaard Acoustical Associates was to provide first-rate interior acoustics, while controlling noise from adjacent areas and the HVAC system. The area was created by excavating the basement area. Special ceiling construction was specified and inspected during construction to assure that footfall noise from overhead would not be audible. New sound isolating features control noise penetration from the main mechanical room. Special noise control features were designed into the HVAC system so that the automatic microphones are not fooled by the background noise. Contact: Mr. Hank Heidt, NCSC, 757-259-1824.

New Recording Studio, William Paterson University, Wayne, New Jersey · WPU determined that educating audio engineers required a new state-of-the-art recording studio complex in the Shea building which houses the WPU music department. OAA was initially retained to perform an acoustical feasibility analysis of the candidate area and subsequently to provide acoustical engineering for the new multi-studio complex. OAA worked closely with the architects and mechanical engineers to develop special sound isolating constructions and identify methods of designing the HVAC systems to achieve quiet and acoustical separation between studios.

Other Studio Experience:

  • American Foundation for the Blind, NY, NY
  • Arista Records, New York, NY
  • Bozell, Jacobs, Kenyon, & Eckhardt, NY, NY
  • Janssen Pharmaceuticals, Titusville, NJ
  • Jersey Central Power & Light, Boonton, NJ
  • Ministry of Information, Riyadh, Saudi Arabia
  • New Jersey Network, Newark, NJ
  • PECO Energy, Philadelphia, PA
  • U. S. I. A. Sound Stages, Washington, DC
  • Voice of America, Washington, DC
  • WNYC Radio, New York, NY

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