Industry News




 

04/16/2012

Creating an Effective Distance Learning Environment

By Linda Gedemer

 
Creating an Effective Distance Learning Environment

Essentially, there are two audiences: the people in the room and the people in the “box” (the camera). Lines in yellow depict what the people in the room need to see and the lines in red depict what the cameras need to see. Tiered seating allows clear sightlines for the students, the instructor and the cameras. Photo credit: Acentech

Sight and sound are crucial elements in the success of distance learning classrooms. However, there is much more to consider than just the types of audio and video equipment to be used. Proper classroom acoustics, good speech intelligibility, clear sightlines, proper lighting, and seating arrangements all need to be considered when developing an effective distance learning classroom that will benefit students and instructors alike. Considerations when choosing a room to renovate into a distance learning room include:

 

  • Quiet, well-isolated space with low reverberation time
  • Few or no windows
  • Controllable lighting, preferably designed for distance learning
  • High volume, low velocity HVAC systems
  • Gasketed doors or vestibules
  • Fixed desks or tables and tiered seating
  • Unobstructed sightlines and camera angles
  • Appropriate finishes

 

Let’s discuss these components and look at how best to accommodate each one within a distance learning environment.

 

Can you hear the other person? Can they hear you?

 

The best microphones on the market may be installed in a classroom, but without proper acoustics, these microphones will not cure speech intelligibility problems. Studies have shown that classrooms with speech intelligibility problems and poor acoustics that cause noise disturbance can lead to lower test scores. Distance learning classrooms, both the near-end room and the far-end room, can suffer from the same problems. What acoustic issues need to be considered when planning a distance learning space?

 

Reverberation (echoed sound) is the enemy of understanding speech clearly. To control reverberation, adequate absorption must be installed in the classroom to alleviate sound from reflecting off multiple surfaces and leading to a buildup of reverberant energy. Acoustic ceiling tiles, fabric-wrapped fiberglass wall panels, fabric drapes, and carpet are commonly used in classroom renovations to control reverberation and improve room acoustics.

 

Building systems, such as HVAC, fluorescent lights, fans, air valves, and diffusers, can also cause background noise problems that make speech audibly difficult, especially if sensitive microphones transmit the noise to the distant learning space. When creating a distance learning classroom within an existing facility, curing noise from building systems can be one of the most difficult acoustic problems to solve. Careful consideration must be given to upgrading to quieter systems to provide a more acoustically comfortable classroom.

 

Distance learning classrooms must also have adequate sound isolation to keep exterior noises from the corridor or the street from intruding into the classroom. It is ideal to choose a classroom that is away from bathrooms, elevators, HVAC compressors, and other noise producing motors and/or plumbing. If this is not possible, rooms should be built-out with walls, floors, and ceilings that can effectively reduce or block the intruding noise. Door gaskets and acoustically rated windows can cut down on the amount of noise “leaking” into the classroom from these sources.

 

Can we all see each other?

 

One of the often-overlooked aspects of distance learning is good eye contact. Like any other type of conversation, people are more comfortable when they can clearly see the other person’s face. Two primary considerations, the interactivity of the distance learning session and who needs to see whom, will drive design decisions such as camera layout, seating layout and lighting design.

 

If only the instructor needs to be seen, the camera and seating layouts become simplified. Depending on classroom size, flexible seating on a flat floor and a single camera location can be sufficient. In larger classrooms and in instances where the instructor and students need to be seen at the distance learning site, permanent tiered seating and two or more camera locations will need to be considered.

 

To promote good viewing, room lighting should be designed to be both people and camera-friendly. The correct types and proper placement of lighting fixtures should be used to reduce glare and veiling reflections on projected images. Specific distance learning and video conferencing lighting equipment has been developed to help alleviate these issues. The selection of materials and finishes for wall panels, ceilings, and furniture must also be video-friendly to avoid moiré effect and reflective glare, and the reflectance values of finishes and colors should be considered. For faces to be clearly seen, it is important to have a good contrast ratio between the flesh tones of the face and the surrounding surfaces so that participants do not blend into the background.

 

Additionally, lighting should come from an angle between 45° and 60° vertical. Horizontally, light should also be cast on the face from an angle in addition to front. This will assure that minimum shadows are created in the eye sockets and under the nose and chin. Direct overhead lighting will cast shadows on the eyes and mouth, making it difficult to decipher lip movement.

 

Room Planning for Distance Learning

 

Typically, schools choose to use an existing facility rather than build a new one for distance learning purposes. In this case, there are some potential expenses that could drive the price of retrofitting a room above the projected costs. Some issues to consider when determining project costs for repurposing an existing room for distance learning include:

 

  • Low background noise (Noise Criterion 25 or NC25) often requires low velocity, high capacity HVAC design
  • Isolation from external noise may require specialized wall constructions, window and door gasketing
  • Reverberation requirements of less than one second will require special wall and ceiling treatments
  • Exterior windows are problematic for light control
  • Specialized videoconferencing lighting may require custom ceiling design
  • Tiered seating may be required in larger venues for proper viewing, as flat seating may not work

 

Keep in mind that not all rooms are ideal for distance learning and the costs to retrofit may exceed the costs of building a new space. Physical constraints that can make an existing room unsuitable for distance learning include: a ceiling too low for the planned group size, impairing camera angles and audience visibility; HVAC noise that is too loud, causing poor speech intelligibility and microphone audibility; inappropriate lighting that creates shadows; and a room layout or ADA requirements that do not allow for tiered seating, creating poor sightlines for students.

 

Technology for distance learning evolves quickly, but the room requirements have remained generally the same. Though it is important to stay abreast of the latest technology when developing a distance learning classroom, it is equally important to carefully plan the space as well. Even the latest and best technologies cannot overcome physical problems inherent in a room.

 

Linda Gedemer, LEED AP, CTS, Assoc. AIA, is a senior consultant at Acentech Inc.


 


Visit our website today to learn about the design flexibility of a Morton building and the endless possibilities of partnering with our designBUILD team.


Wood construction is both cost and energy efficient. Check out Morton Buildings and our designBUILD team online today to discover all the benefits of post-frame construction.


When choosing a metal-clad building for your next construction project, consider Morton Buildings, Inc., and their designBUILD team, we’ll make your dream a reality.

Bluebeam® Revu® simplifies digital facilities document management from design review to leveraging as-builts, maintenance manuals and O&Ms submittals.

We Can Help You Reduce Energy by 30%

Our mission is to help our customers manage their buildings' energy costs, improve reliability, and enhance performance while having a positive impact on the environment.
CLICK HERE to find out how.


Visit our website today to learn about the design flexibility of a Morton building and the endless possibilities of partnering with our designBUILD team.


Wood construction is both cost and energy efficient. Check out Morton Buildings and our designBUILD team online today to discover all the benefits of post-frame construction.


When choosing a metal-clad building for your next construction project, consider Morton Buildings, Inc., and their designBUILD team, we’ll make your dream a reality.

Bluebeam® Revu® simplifies digital facilities document management from design review to leveraging as-builts, maintenance manuals and O&Ms submittals.

We Can Help You Reduce Energy by 30%

Our mission is to help our customers manage their buildings' energy costs, improve reliability, and enhance performance while having a positive impact on the environment.
CLICK HERE to find out how.


 
08/29/2014

New tool from FEMA helps facility managers prepare for and mitigate the effects of nonstructural earthquake damage. 

08/28/2014

Is your building's exterior prepared for consistent snowstorms?

08/27/2014

Researchers have developed wearable, customizable technology to handle access control at busy hotels. 

08/26/2014

A new study shows that hotels which are LEED certified bring in more revenue than their non-certified competitors. 

08/25/2014

Policies designed to reduce carbon emissions have the added benefit of increasing air quality, which could pay for the reduction policies themselves. 

08/22/2014

Researchers at Michigan State University have developed a luminescent solar concentrator that is as transparent as glass. 

08/21/2014

The Department of Energy has released two reports which indicate wind turbine installations and efficiency is growing while prices drop. 

08/20/2014

The NHL has partnered with the NRDC to release their first sustainability report. 

08/19/2014

A new battery has been developed that is free of toxic materials and longer lasting than its more expensive competitors.

08/14/2014

A new study shows that emergency communications that don't specify the threat could be doing more harm than good.

08/13/2014

Natural light's benefits to workers extend far beyond the workday.

08/12/2014

Will a "Little Box" change the future of electricity?

08/07/2014

Could your building withstand an F3 tornado repeatedly?

08/06/2014

Make sure your conference room is properly outfitted with a projection system that meets your occupants' needs.

08/04/2014

The update to the Building Energy Quotient program includes more building types and a new methodology to measure "In Operation" buildings.

07/31/2014

Improper lockdown security may leave your building and occupants vulnerable

07/29/2014

Is the American energy policy lagging behind the rest of the world?

07/22/2014

How to keep building occupants safe during the hot season.

07/21/2014

Spaces grow denser as the industry emerges from a slump.

07/18/2014

Study ranks states on fuel and consumption.

Page 1 of 44
FirstPrevious[1]2345678910NextLast

Sponsored Links