Subliminal messages
If you are distracted, you may not even notice the rain. But it is loud enough that you will be able to recognize it as rain and will notice when it stops.
In the context of neurons, the threshold refers to the level of stimulation needed to generate an action potential or nerve impulse. Once the input signal surpasses this threshold, the neuron will fire and transmit an electrical signal down its axon. Below the threshold, the neuron remains inactive.
auditory
The Signal Detection Theory could suggest that watching a horror movie late at night could lower your absolute threshold for sound. Exposure to intense stimuli like a horror movie might lead to heightened arousal and sensitivity to sensory input, such as sound, which could affect your perception and response to stimuli like trying to fall asleep in a quiet environment.
There are several types of dB. dB SPL are decibels measuring sound pressure levels. There is an accepted reference point of 0 dB SPL which equals 20 micropascals = 2 × 10-5 pascals. dB SL are decibels measuring a signal relative to an individuals auditory threshold. For example, if a person's minimum threshold is 30 dB HL (yet another type of decibel measuring how much worse a person's hearing is based on a referential dB level) and a signal is at 40 dB HL, the sensation level of this signal to this individual is 10 db SL (40 dB - 30 dB = 10 dB SL).
A. absolute. The threshold for detecting an auditory signal is known as the absolute threshold, which refers to the minimum intensity of a sound that can be detected by the human ear.
Defining line.
An absolute threshold was seen as a hypothetical barrier that incoming stimuli must overcome before they can be perceived, it was based on the ability to pass through the threshold based on absolute judgements about a single stimulus. In the case where a person were to, for example- detect a light, the strength of said light would have to be strong enough to pass the threshold for an observer to perceive it, it was generally based on the observer's ability to detect a signal.In reality however, there is no such threshold that splits the stimulus dimension into detectable and undetectable components. Rather, a stimulus must yield a sensation that exceeds the decision criterion (beta) for even the weakest signal to be perceived, so a decision threshold is the stimulus that elicits the response or perception. The detectability and reporting of the presence of a signal- or the light- are both factors because the decision threshold must be passed and the results from the strength of the stimulus, for example the light- as well the evidence of yielding such strength, must be plausible. Only in this case, do we have correct detection of a signal.
olfactory!! not auditory
An absolute threshold was seen as a hypothetical barrier that incoming stimuli must overcome before they can be perceived, it was based on the ability to pass through the threshold based on absolute judgements about a single stimulus. In the case where a person were to, for example- detect a light, the strength of said light would have to be strong enough to pass the threshold for an observer to perceive it, it was generally based on the observer's ability to detect a signal.In reality however, there is no such threshold that splits the stimulus dimension into detectable and undetectable components. Rather, a stimulus must yield a sensation that exceeds the decision criterion (beta) for even the weakest signal to be perceived, so a decision threshold is the stimulus that elicits the response or perception. The detectability and reporting of the presence of a signal- or the light- are both factors because the decision threshold must be passed and the results from the strength of the stimulus, for example the light- as well the evidence of yielding such strength, must be plausible. Only in this case, do we have correct detection of a signal.
The primary auditory cortex, i.e. where the auditory signal first reach the cortex, is located on the Heshl's gyrus, on the supratemporal plane (the upper part of the temporal lobe). The auditory information then spreads to secondary auditory cortices located around primary the primary auditory cortex. Then the auditory signal diffuses to associative areas located in the parietal and frontal lobes.
signal detection theory
If you are distracted, you may not even notice the rain. But it is loud enough that you will be able to recognize it as rain and will notice when it stops.
Signal detection theory assumes that top-down processing can influence a person's absolute threshold for a particular stimulus. This theory suggests that factors such as individual differences in attention and expectation can impact an individual's ability to detect a stimulus in a noisy environment.
An expander works in a similar way to a compressor, with a compressor you set the threshold and when the signal goes over this threshold the compressor starts to work. The signal over the threshold is attenuated (reduced) at the rate of the other parameter settings (ie. attack, ratio, release,etc.). An expander works in an opposite fashion, the threshold is set and any part of the signal dropping below this threshold will be affected by the expander and this level will be raised. The expander therefore like the compressor balances out the signal making it sound more professional.
In the context of neurons, the threshold refers to the level of stimulation needed to generate an action potential or nerve impulse. Once the input signal surpasses this threshold, the neuron will fire and transmit an electrical signal down its axon. Below the threshold, the neuron remains inactive.
Oh, isn't that just lovely? When you hear the gentle pitter-patter of rain on the roof, it's like nature giving you a little nudge to pay attention. Your threshold for detecting that sound is like a special doorway that lets you connect with the world around you in such a peaceful way. Embrace those moments of awareness, my friend, they're like little gifts from the universe.