0
Why does the upper threshold of hearing get lower as you get older?
Wiki User
∙ 10y ago
Because of your mom
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
The upper range of human hearing is approximately how many hertz?
20,000
How many different types of sound waves are there?
All sound is the same, just at different frequencies and volume. However sound is often categorised into three groups. Subsonic - Low frequency, below the threshold of human hearing. 25 hertz or less. Audible - Any sound a normal human being can hear. 25 Hertz - 18 Kilo Hertz. Ultrasonic - High frequency sound, above the threshold of human hearing. 18 Kilo hertz and above. It should be noted that some animals such as dogs and bats can hear much higher frequencies than humans. Also note, the upper limit of human hearing varies from person to person, and decreases with age. 18 - 18.5 kilo hertz is normally the upper limit for most people.
What are the upper and lower frequency thresholds for human hearing?
The exact frequency limits of human sound perception vary from one individual person to the next, but as a population average, the audio industry has always used the range of 20 Hz to 20,000 Hz.
What is the upper and lower critical temperature of steel?
upper critical temp. means 273k and lower temp. means -273k.now 50 deg cent. above upper cri. temp means 273+50 deg cent.(=273+323)kelvin
Can human hear sound above 100kHz?
Not usually, 15-22 kHz is the upper limit in normal hearing.
Why do you think the upper-threshold gets lower as people get older?
Please provide more information/context/clarification to help us answer this question. You can post your response in this answer text by clicking "Edit."
Why is the lower mantle more rigid and dense then the asthenosphere in the upper mantle?
The lower mantle is older and cooler than the upper mantle. Thank you for reading this I'm comment if you like one direction(: hehe
What is the use of variable resistor in schmitt trigger?
AnswerMy thoughts are that it is used to set the trigger point where the trigger fires. That is to say, if the voltage exceeds the reference set point, the trigger will then fire.To independently control the upper threshold and the lower threshold, some Schmitt trigger gates have 2 variable resistors: * a voltage-divider potentiometer, where the center tap selects the "average threshold"* a feedback variable resistor, which adjusts the amount of hysteresis (the difference between the upper threshold and the lower threshold).
Why is a Schmitt trigger called a regenerative comparator?
A Schmitt Trigger is a comparator, because it compares its input voltage to a "threshold" voltage, but it has _two_ threshold voltages (the upper and lower trigger voltages), and which threshold voltage is used depends on the output state. If the input voltage is higher than the upper trigger voltage, the output will be high (for a non-inverting Schmitt trigger). In this state, the input is compared to the lower threshold voltage, so the input now has to go below the lower threshold voltage before the output will go low. The threshold voltage depends on the output state, such that a high output selects the lower threshold voltage, and a low output selects the upper threshold voltage. This can be visualised as using a fixed threshold but adding a small voltage (the difference between the upper and lower threshold voltages, also called the hysteresis voltage) to the input voltage before it is compared. This small added voltage is high when the output is high, and low when the output is low. A small amount of the output voltage is effectively being added to the input voltage before it is compared to a fixed threshold. This is positive feedback, also called regenerative feedback. So a Schmitt trigger operates as a voltage comparator, and a small amount of the output is added to the input, so it uses positive or regenerative feedback.
What upper in Upper Normandy refer to?
opposite upper is lower Normandy.What do upper and lower refer to?
Where did horus live?
He lived some where in lower Egypt. But lower Egypt is upper Egypt because upper is lower and lower is upper.
Why were the crowns of upper and lower Egypt combined?
The crowns of upper and lower Egypt were combined because King Menes combinded upper and lower Egypt. He decidd to combine upper and lower Egypt and the crowns.
Where were the two regions that was made up ancient Egypt?
Upper Egypt and Lower Egypt
How does the highest pitch one can hear vary with age?
the highest pitch one can hear varies with age because as one gets older the upper limit of hearing decreases.
what is the cost of upper and lower dentures.?
what is the cost of upper and lower dentures.
Who do you work out the upper and lower quartile?
you do work out the upper and lower quartile
What is lower extrimities and upper extrimities?
Lower parts of the body vs. upper parts of the body, e.g. arms(upper), legs(lower).
