History & Misc.
Hearing Sciences is a narrow discipline within what broader subject/discipline?
Physics
A sound wave is period in nature and can be classified as what type of wave?
Longitudinal
The interaural ____________ difference refers to the slight difference in loudness of sound when it arrives to the ear closest to the sound source and then the ear farthest from the sound source.
intensity
True or False. The navel (belly button) is superior to the navel.
False (Inferior)
Name 3 landmarks of the pinna
Helix, Tragus, Antitragus, Lobule, Concha bowl
Sound can be divided into two parts: (1) Physical and (2)____
Psychophysical
Which characteristics of sound waves is defined as "number of cycles per second"
Frequency
What is dB HL referred to as?
Audiometric Zero
The outer ear is comprised of what two structures?
Pinna and external auditory meatus
What are the two functions of the external auditory meatus?
(2) Protect eardrum
The perceptual correlate to frequency is:
Pitch
What is the formula for calculating wavelength?
wavelength = velocity/frequency
If two sine waves of the same frequency occur at 180 degrees out of phase of each other, what would happen?
They would cancel each other out and no sound would be heard.
Which portion of the temporal bone houses important inner ear structures?
What frequency range does the natural resonance of the Pinna occur?
5,000-6,000 Hz
What is the base in this equation?
6x6x6x6 = 6^4
6
A swing completes 4 full cycles in one second. What is the frequency? What is the period?
F= 4 Hz
T= .25 sec
If the minimum audible pressure perceived by a human at 1000 Hz is 7 dB SPL, what is the minimum audible pressure at 1000 Hz in dB HL?
0 dB HL
What are the two anatomical names for the most outer part of the ear?
Auricle and Pinna
False. It's passive!