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Definition
| Stength of a wave or the amount of energy it carries. Changes in amplitude are perceived as divergences of volume. |
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| A place where the source wave and its reflection greatly reinforce each other because they are in-phase. |
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| When two waves are 180 degrees out of phase the sum of the two waves will cancel each other out. |
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Definition
| Hearing loss caused by a rare disorder in the brain affecting comprehension of sound. |
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| Waveforms that contain overtones or variant mixtures of many related frequencies(known as harmonics) that are created simultaneously with a fundamental, base tone. |
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Definition
| An are of higgher-than-normal air pressure within a cycle of sound. |
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Definition
| Hearing loss caused by disease, infection, or other physical ailments. |
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Definition
| Rooms that are designed to have low reflections of sound or reverb. |
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Definition
| Univeral unit of amplitude measurement for the intensity of a signal expressed on a logarithmic scale. |
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| The bending of a wave around the edge of a barrier. (i.e. doorways, etc.) |
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Definition
| Passageway connecting the throat and sinuses with each inner ear. |
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Definition
| The number of times you have to multiply the foregoing nuber (called the base) by itself. It is noted in superscript notation alongside the base. |
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Definition
| The number of wave cycles passing a single point in a specific amount of time. Sound is customarily measure in quantity of cycles per second, and frequency changes are distinguished mentally as variations in pitch. |
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Definition
The universal unit of frequency measurement. One complete cycle (one full compression and rarefaction)per second.
(Range of human hearing = 20Hz- 20kHz) |
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Definition
| Two or more waves occupying the same space and time. |
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Definition
| Rooms constructed with "hard" materials to increase the amount of reflection of sound or reverb. |
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Term
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Definition
| Related to the exponent, its notation is x=logbM, where b corresponds to the base once more. |
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Definition
| Related to the perception of sound, loudness differs in one ear and the other giving an understanding of direction, an effect that can be re-created by "panning" from one speaker, or headphone, to another. |
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Term
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Definition
| Material through which sound travels. Any matter can be a medium of sound. |
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Definition
| A place in a room where the source wave and its reflection are 180 degrees out of phase, creating a pocket of silence for that frequency. |
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Definition
| Harmonic, or set of sympathetic frequencies that resonate when a single base note is played. |
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Definition
| Duration to complete one cycle of the wave. |
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Term
| Permanent Threshold Shift |
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Definition
| When the damage of overexposure irreversibly reduces the range of frequencies the ear is equipped to receive. |
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Definition
| Measure of the timing differentials among two reproductions of the same waveform. |
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Definition
| In relation to perception of sound, registered nominal timing delays caused by sound waves hitting one ear drum before the other. |
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Definition
| the way in which we mentally distinguish between changes in frequencies. |
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Definition
| Natural declining of human hearing as we age. |
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Definition
| Area of lower-than-normal air pressure during a cycle of sound. |
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Term
| Real Time Analyzers (RTA) |
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Definition
| Precision device capable of documenting and detailing the frequencies of perceived high and low pitch sounds. |
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Definition
| Bouncing of waves that result off the surface of boundaries. |
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Definition
| Occurs when a wavelength of a particular frequency is reinforced by its own reflections. |
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Definition
| Multiple reflections from interactions with multiple boundaries. |
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Definition
| Variations in air pressure that have been translated into electricity. |
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Definition
| Basic, regular waveform such as sine waves or square waves. Typically must be artificially generated. |
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Term
| Sound Pressure Level Meter (SPL) |
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Definition
| Provides strength, or amplitude, information on the air pressure metrics that are perceived as a sound's loudness. |
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Definition
| Precision device capable of documenting and detailing the frequencies of perceived high and low pitch sounds. |
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Definition
| Interference caused by sounds of a constant frequency reflecting off of parallel walls. Characterized by lack of vibration at certain points, between whcih areas of maximum vibration occur periodically. |
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Definition
| When two waveforms are in phase they will combine to equal the sum of the two waves. |
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| Temporary Threshold Shift |
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Definition
| Such as the ringing effect experienced by numerous concert goers. |
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Definition
| Condition in which a enduring ringing or hissing within ones ear occurs. |
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Definition
| When the energy of a sound wave is absorbed into a boundary and sets it into motion. |
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Definition
| The actual contour of the wave when it is represented graphically in 2-D. |
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Definition
| The physical length of a wave. Determined by dividing the speed of a wave by its frequency. |
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