Typical Wavelengths
Some typical wavelengths for midfrequency octave centers are shown in Table 3.2. Now suppose the temperature increases 20°F to 92.5°F.
Suppose we had “tuned” to the peak of a 1000-Hz standing wave in a room first at 72.5°F and then later at 92.5°F. The apparent frequency shift would be
where 1151 is the velocity (ft/s) at the temperature of measurement and 1.13 is the wavelength at the original temperature.
Related posts:
INTRODUCTION TO MOTOR/DRIVE SELECTION
INDUCTION MOTOR EQUIVALENT CIRCUIT:THE IDEAL TRANSFORMER
Amperes and Rotor Bar Design
Position, direction, distance and motion:Distance travelled
Thyristors:TRiACs
Signal-carrying switches:Reed switches
PROGRAMMABLE-LOGIC AND APPLICATION-SPECIFIC INTEGRATED CIRCUITS (PLASIC):PERIPHERAL PROGRAMMABLE-LOG...
MAINTENANCE OF MOTORS:TYPICAL CAUSES OF WINDING FAILURES IN THREE-PHASE STATORS
CONTROL FUNDAMENTALS:HVAC SYSTEM CHARACTERISTICS
Components:Building Block Components
Power Quality Test Instruments
Feedback Control Theory:Linearization Technique
Motor Principles
STARTING OF WOUND-ROTOR INDUCTION MOTORS