Lessons 3, 4, 5

Imagine two pure tones. Each has a frequency of 1250 Hz and amplitude of 2000 mPa, but Tone A has a starting phase of 0^o, while tone B has a starting phase of 60^o. If these two tones are presented to a listener one at a time, how will Tone A sound relative to Tone B?

A. Tone A will sound louder than Tone B

B. Tone A will sound softer than Tone B

C. Tone A will sound identical to Tone B

D. Tones A and B will be equal in loudness, but Tone A will be lower in pitch

Imagine two pure tones. Each has a frequency of 1250 Hz and amplitude of 2000 mPa, but Tone A has a starting phase of 0^o, while tone B has a starting phase of 60^o. If these two tones are presented to a listener one at a time, how will Tone A sound relative to Tone B?

A. Tone A will sound louder than Tone B

B. Tone A will sound softer than Tone B

C. Tone A will sound identical to Tone B

D. Tones A and B will be equal in loudness, but Tone A will be lower in pitch

C. Tone A will sound identical to Tone B

A spectogram is a display of frequency and intensity as a function of (Answer 1). (Answer 2) is displayed on the y-axis, while (Answer 3) is indicated by the darkness of the display.

A. Pitch

B. Intensity

C. Phase

D. Time

E. Loudness

F. Frequency

1. time

2. frequency

3. intensity

When you tap a crystal goblet with a spoon, it makes a bell-like sound that lasts for a long time. This is an example of (Answer 1) damping. In contrast, if you hit a bass drum with a mallet, it makes a booming sound that ends quickly but not immediately. This is an example of (Answer 2) damping.

1. light

2. heavy

When looking at pure tones displayed on an oscilloscope, what does increasing the frequency of the tone do to the display?

A. The waveforms will be taller.

B. There will be fewer waves on the screen.

C. There will be more waves on the screen

D. The waveforms won't be as tall.

C. There will be more waves on the screen

Which aspect of sound most closely correlates with loudness?

A. Amplitude

B. Frequency

C. Pitch

D. Distance

A. Amplitude

What is the interrupter switch on an audiometer used for?

A. To select the test frequency

B. To switch between the ears

C. To turn the signal on or off

D. To switch between air conduction and bone conduction

C. To turn the signal on or off

Using otoscopy looking at a normal right tympanic membrane, which landmark should be visible in the anterior inferior quadrant?

A. Stapes

B. Pars Flaccida

C. Incus

D. Cone of light

D. Cone of light

Pressure is placed on the external ear canal to:

A. Check for a collapsed ear canal.

B. Confirm the Lombard effect.

C. Check for blockage in the ear canal.

D. Check for ear canal atresia.

E. Check for a seal when using headphones.

A. Check for a collapsed ear canal.

The tympanic membrane is composed of three layers. What is the most medial* layer made of? [Medial=innermost with reference to the body].

A. Mucous Membrane

B. Skin

C. Connective tissue

D. Pars Flaccida

A. Mucous Membrane

What are three major landmarks the examiner looks for during an otoscopic examination?

A. Malleus, umbo, annulus

B. Umbo, Nebo, Pars Tensa

C. Incus, manubrium of the malleus, stapes

D. Tensor tympani, malleus, Shrapnell's membrane

A. Malleus, umbo, annulus

On the picture, what is letter a?

A. Tragus

B. Concha

C. Helix

D. Anti helix

C. Helix

Use the RETSPL's for TDH 39 headphones listed above:
If the level of a 3000 Hz tone is 60 dB HL, what is the level in dB SPL?

A. 70 dB SPL

B. 50 dB SPL

C. 70 dB HL

D. 50 dB HL

A. 70 dB SPL