Deflection of the Eardrum at Various Sound Levels
If we make the assumption that the eardrum displacement is the same as that of the air striking it, we can write
where Din is the displacement in inches (the rms amplitude) of the air, Dcm is the displacement in centimeters, f is the frequency in hertz, and LP is the sound level in decibels referred to 0.00002 N/m2.
Example
What is the displacement of the eardrum in inches for a tone at 1000 Hz at a level of 74 dB? Using Eq. (2-51),
which is a displacement of approximately one-one-millionth of an inch (0.000001 in).
Related posts:
Light and associated radiation:Photosensors
Magnetic line Voltage Starters
Lighting Circuits:Domestic Lighting Circuits
Review of Electric Motor Maintenance Troubleshooting
GENERATOR COMPONENTS, AUXILIARIES, AND EXCITATION:OTHER COOLING SYSTEMS
AUDIO AND VIDEO SYSTEMS – TELEVISION CONTROLS
GENERATOR INSPECTION AND MAINTENANCE:GENERATOR TESTING
PNEUMATIC CONTROL FUNDAMENTALS:PRESSURE REDUCING VALVE STATION
INDUSTRIAL INTELLIGENT CONTROLLERS:PLC (PROGRAMMABLE LOGIC CONTROL) CONTROLLERS
Twelve-Lead Single-Speed Motors
Cables and Cable Termination:Fixing Devices
Speed control of d.c. Motors:Electric Braking
Software for Electronics:Software for electricity and electronics
Dc motors:Identifying Windings