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well ap- cj > Sound and Thermal > Flashcards

Sound and Thermal Flashcards

1
Q

Thermal Performance
1. Precondition or Optimization
2. Intent
3. Issue
4. Solutions

A
  1. Precondition
  2. Provide thermal environment most users find acceptable
  3. The thermal environment is ranked as one of the strongest contributing factors to overall health and satisfaction. Thermal temperatures can also impact comfort and productivity.
  4. Provide a space that meets the six core parameters: air
    temperature, humidity, air movement, mean radiant temperature of surrounding surfaces, metabolic rate and clothing
    insulation
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2
Q

Verify Thermal Comforts
1. Precondition or Optimization
2. Intent
3. Issue
4. Solutions

A
  1. Optimization
  2. Enhance thermal comfort by ensuring that at least 80% of users are satisfied with the their thermal environment.
  3. Despite having established standards, studies show that only 11% meet thermal environments that meet general human satisfaction.
  4. Survey for thermal comfort. For spaces over 45 occupants, at least 35% need to answer. Scores need to be at least 80% satisfactory.
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3
Q

Thermal Zoning
1. Precondition or Optimization
2. Intent
3. Issue
4. Solutions

A
  1. Optimization
  2. Enhancing thermal comfort through zoning
  3. thermal comfort preferences are highly invidivdual. Allowing digital thermostats can help individuals meet thier needs.
  4. Control of each thermal zone is each thermal zone is 650 ft²(60 m²) or 10 occupants, whichever is larger.
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4
Q

Individual Thermal Control
1. Precondition or Optimization
2. Intent
3. Issue
4. Solutions

A
  1. Optimization
  2. Maximize and personalize thermal comfort among all individuals
  3. Due to individualized nature of thermal comfort, not everyone will be equally comfortable under the same same conditions. Secondary factors such as age, sex, health conditions also play role.
  4. Provide personal cooling and heating options like a desk fan, electric heater, cooling/heating chair without affecting other occupants. Allowing a flexible dress code can also assist.
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5
Q

Radiant Thermal Comfort
1. Precondition or Optimization
2. Intent
3. Issue
4. Solutions

A
  1. Optimization
  2. improve ventilation and thermal comfort by incorporating radiant heat and cooling into building designs.
  3. All air systems can be disrupted by windows, uninsulated walls, and have a higher risk of draft discomfort due to elevated velocity.
  4. Implementing radiant heat and cooling strategies provide heat and cooling to surrounding areas such as floor, walls, and ceilings. This system is more efficient and quiet.
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6
Q

Provide examples of loud zones

A

Rooms or areas where loud activities occur such as equipment rooms, fitness rooms, or appliance rooms

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7
Q

Provide examples of mixed zones

A

presentation rooms, collaboration rooms, open conferencing spaces

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8
Q

What is a circulation zone

A

areas that are intended for egress between regularly occupied spaces

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9
Q

What is reverberation time

A

The amount of time that an impulse (balloon popping), or an interrupted noise requires to decrease by 60 decibel

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10
Q

Define LEQ

A

Sound pressure level metric that is equivalent to the acoustic energy measured over the duration of a specific sound pressure level

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11
Q

What is a sound transmission class (STC)?

A

Number rating of the acoustical performance across a partitions as measured in a laboratory.

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12
Q

What is a noise isolation class (NTC)?

A

measurement of sound insulation across a partition dividing two spaces.

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13
Q

Sound Mapping
1. Precondition or Optimization
2. Intent
3. Issue
4. Solutions

A
  1. Precondition
  2. Incorporate strategies prevent acoustic disturbances from various sources.
  3. Architectural trends such as open workspaces, exposed HVAC foster noisy environments. When noise volume increases, it leads to less productivity.
  4. Provide an annotated floor plan that shows zones such as loud, quiet, mixed.
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14
Q

Maximum Noise Level
1. Precondition or Optimization
2. Intent
3. Issue
4. Solutions

A
  1. Optimization
  2. Achieve desired ambient noise levels such that HVAC, exterior noise intrusion or other noise sources do not
    impact occupant health and well-being.
  3. when background noises such as HVAC systems, traffic, or other building services are noisy, it decreases productivity and interrupt performance.
  4. Background noise levels are measured over a period of five minutes and average sound pressure levels do not
    exceed the thresholds
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15
Q

What are the preconditions of Thermal and sound ?

A
  1. Thermal performance
  2. Sound mapping
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16
Q

Thermal Comfort Monitoring
1. Precondition or optimization
2. Intent
3. Issue
4. Solution

A
  1. optimization
  2. monitor and effectively address unacceptable thermal comfort conditions
  3. to maintain ideal metrics of thermal comfort, projects should continuously gather and monitor data to inform remediation actions.
  4. Monitor indoor environment through sensors that gather data and are submitted to GWBI.
17
Q

Humidity Control
1. precondition or optimization
2. intent
3. issue
4. solution

A
  1. optimization
  2. limit the growth of pathogens by providing the appropriate level of humidity
  3. Warm and humid spaces are prone to mold and bacterial growth which causes health problems.
  4. Provide relative humidity within a range of 30%-60%.
18
Q

Sound barriers
1. precondition or optimization
2. intent
3. issue
4. solution

A
  1. optimization
  2. increase the level of sound isolation and speech privacy between enclosed spaces
  3. Sound the transmit through walls and doors can be distracting.
  4. Ensure that sound transmission class (STC) are met. STC of 60 should be met between loud zones and other occupiable spaces. STC of 45 should be met between rooms of occupation and concentration rooms.
19
Q

Reverberation Time
1. precondition or optimization
2. intent
3. issue
4. solution

A
  1. optimization
  2. design spaces that are in accordance with reverberation times that support speech and vocal effort.
  3. Large spaces with higher reverberation time have increased ambient noise levels and reduce speech intelligibility.
  4. Reverberation time can be controlled by adding absorptive pads on the ceilings and surrounding walls.
20
Q

Sound reducing surfaces
1. precondition or optimization
2. intent
3. issue
4. solution

A
  1. optimization
  2. design spaces with sound reducing surfaces to minimize the build up of speech and other unwanted sounds.
  3. Increase in reverberation are linked to a lack of acoustical absorption.
  4. Providing sound acoustical treatment in spaces. Ceilings typically work best. Spaces need to meet a certain noise reduction reading.

well ap- cj (9 decks)

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