Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how


Audiology SLP314

Sound amplitude is expressed in what? Pressure.
Pascals (Pa) are units of what? (Sound) pressure.
Decibels are what kind of scale? Logarithmic (ratio). It compares two pressures.
What is the formula for dBs? dB = 20 log (P1/P2) Take the logarithm (base 10) of the ratio of two sound pressures and multiply it by 20.
What is the reference for measuring a single sound (zero point)? 20 μPa. The lowest sound pressure humans can hear.
How are sounds measured using the standard reference denoted? dB SPL (sound pressure level)
What is the maximum tolerable sound pressure for humans? 140 dB SPL.
How many dBs SPL is 20 μPa? 0.
What does a sound level meter do? It measures sound pressure and converts to dB SPL scale.
What's the relationship between intensity and loudness? Loudness is a subjective perception of intensity.
What is a hearing threshold? The lowest point one can hear.
What shape is the human audibility curve and why? Banana-shaped, because the outer and middle ears transmit middle frequencies more efficiently than low and high frequencies.
Created by: ashea01