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Frequency: To understand why dogs can hear higher frequency noise than humans, it is important to understand what frequency is. All sound is made up of waves. Ears take those waves and translate them into an auditory signal that the brain processes as sound. The frequency of sound is measured in hertz, which describes how many cycles the wave makes within a second. What the brain understands as pitch, or how high or how low a particular noise sounds, is a function of the frequency of that noise. A higher hertz rating on a sound results in a perceived higher pitch.
Human beings have a range that averages from around 64 Hz to 23kHz. Dogs on the other hand hear from around 67 Hz to 45kHz, meaning they have the ability to hear sounds with almost double the frequency that humans can perceive. These limits are imprecise, as factors such as individual physiology and age-related deterioration affects that actual hearing range of any individual person or dog.
The megahertz, abbreviated MHz, is a unit of alternating current (AC) or electromagnetic (EM) wave frequency equal to one million hertz (1,000,000 Hz). The megahertz is commonly used to express microprocessor clock speed. The unit is occasionally used in measurements or statements of bandwidth for high-speed digital data, analog and digital video signals, and spread spectrum signals. Other units of frequency are the kilohertz (kHz), equal to 1,000 Hz or 0.001 MHz, and the gigahertz (GHz), equal to 1,000,000,000 Hz or 1,000 MHz.
You can construct an arbitrary waveform and use it as a modulating waveform to generate a musical passage on a function generator. By varying the vertical values of an arbitrary waveform you produce different frequencies, and by varying the number of horizontal points of the waveform you control the duration of the notes.
Tinnitus /ˈtɪnɪtəs/; from the Latin word tinnītus meaning "ringing" is the perception of sound within the human ear not including the perception of sound outside the ear.
Most people with tinnitus have some degree of hearing loss,in that they are often unable to hear clearly external sounds that occur within the same range of frequencies as their "phantom sounds". This has led to the suggestion that one cause of tinnitus might be a homeostatic response of central dorsal cochlear nucleus auditory neurons that makes them hyperactive in compensation to auditory input loss.
Perception (from the Latin perceptio, percipio) is the organization, identification, and interpretation of sensory information in order to represent and understand the environment.
intuition - direct perception of truth, fact, etc., independent of any reasoning process; immediate apprehension. (1 of 5)