A type of Light color temperature which is best in kitchens, bathrooms or garages; giving rooms a whiter, more energetic feel

A type of Light color temperature which is best in bathrooms, kitchens and basements; good for reading, intricate projects, or applying makeup-provides the greatest contrast among colors.

The amount of light or density of luminous flux striking a unit area.

A Gas-Discharge Lamps and have been widely used in industrial lighting, especially in large manufacturing facilities, and are commonly used as plant grow lights. They contain mercury. They have also been widely used for outdoor area lighting, such as on roadways, parking lots, and security areas. Understanding the change in human color vision sensitivity from photopic to mesopic and scotopic is essential for proper planning when designing lighting for roadways.

HCL expresses the positive effect of light and lighting on the health, well-being and performance of humans and thus has both short and long-term benefits.

The glare of all luminaires that are in the room regularly can be evaluated with the UGR method, as specified in the standard EN 12464-1 “Lighting of indoor workplaces”. What is UGR?

An electrical lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides.

Lamps having a borosilicate glass gas discharge tube (arc tube) containing solid sodium, a small amount of neon, and argon gas in a Penning mixture to start the gas discharge.

A Lamp that produces light as a result of an electrical discharge, generated between two electrodes, in a high-pressure mercury vapor that is contained in a transparent bulb.

The distance, measured in the direction of propagation of a wave, from any one point to the next point of corresponding phase.

Defined as the loss that occurs when a sound goes through a partition or barrier. A higher TL number means more loss, i.e., less acoustic energy gets through.

Which of the following Floor and Ceiling Systems has the least Sound Transmission Class (STC)?

The velocity of sound travelling through air.

The rate at which acoustic energy flows through a medium, expressed in watts per square meter.

An apparent shift in frequency occurring when an acoustic source and listener are in motion relative to each other, the frequency increasing when the source and listener approach each other and decreasing when they move apart.

The maximum deviation of a wave or alternating current from its average value.

The SI unit of frequency, equal to one cycle per second.

What is a vibration having a frequency that is an integral multiple of that of the fundamental.

Walls provide building occupants with the most protection from exterior noise. Different wall materials and designs vary greatly in their sound insulating properties. Which of the following way(s) in which the acoustical properties of walls can be improved?

The level of sound intensity high enough to produce the sensation of pain in the human ear, usually around 130 db.

The unit for expressing the relative pressure or intensity of sounds on a uniform scale from 0 for the least perceptible sound to about 130 for the average threshold of pain.

The minimum sound pressure capable of stimulating an auditory sensation; usually 20 micropascal or zero db.

Which of the following wall types shows the highest sound insulation values?

The repetition of the sound produced by the reflection of sound waves from an obstructing surface, loud enough and received late enough to be perceived as distinct from the source.

TRUE or FALSE. In general, plantings by themselves do not provide much sound attenuation. It is more effective, therefore, to use plantings in conjunction with other noise reduction techniques and for aesthetic enhancement.

What is the persistence of a sound within an enclosed space, caused by multiple reflections of the sound after its source has stopped.

The intensification and prolongation of sound produced by sympathetic vibration.

The decrease in energy or pressure per unit area of a sound wave, occurring as the distance from the source increases as a result of absorption, scattering, or spreading in three dimensions.

Sound waves are what type wave?

Double-glazed windows are paired panes separated by an airspace or hung in a special frame. Which of the following technique cannot increase the performance of the double-glazed window in reducing noise?

The combination of microphones, signal processors, amplifiers, and loudspeakers in enclosures all controlled by a mixing console that makes live or pre-recorded sounds louder and may also distribute those sounds to a larger or more distant audience.

TRUE OR FALSE: For buildings as noise shields; a long building, or a row of buildings parallel to a highway cannot shield other more distant structures or open areas from noise.

A wave in which the particles of the medium vibrate back and forth in the ‘same direction’ in which the wave is moving. Medium can be solid, liquid or gases.

The process of adding background sound to reduce noise distractions, protect speech privacy and increase office comfort

A science that deals with the production, control, transmission, reception, and effects of sound

The time required for one complete cycle of a wave oscillation.

A high-density part of the wave. It is the peak of the wave

A low-density part of the wave. This is the trough of the wave.

A measure of the energy loss of sound propagation media?

A measure of the opposition that a system presents to the acoustic flow resulting from an acoustic pressure applied to the system.

A family of non-destructive testing techniques based on the propagation of ultrasonic waves in the object or material tested. It is used in many industries including steel and aluminum construction, metallurgy, manufacturing, aerospace, automotive and other transportation sectors.

Refers to the deflection of sound waves around a small obstacle or part of an obstacle, or at the edge of a large obstacle or restricted opening.

Ultrasonic wave is as sound wave transmitted at a frequency greater than ____ hertz per second or beyond the normal hearing range of humans.

The human ear has receptors that can detect sound frequencies raging from 16 vibrations to _____ vibrations per second.

Perceived as how "loud" or "soft" a sound is and relates to the totaled number of auditory nerve stimulations over short cyclic time periods, most likely over the duration of theta wave cycles.

A transducer that converts sound into an electrical signal.

The scientific study of sound perception and audiology – how humans perceive various sounds. More specifically, it is the branch of science studying the psychological and physiological responses associated with sound (including noise, speech and music).

He is considered as the father of architectural acoustics.

A type of noise that is produced by combining sounds of all different frequencies together.