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Audiometry > Psychoacoustics > Flashcards

Psychoacoustics Flashcards

1
Q

What is frequency?

A

Cycles per second, Hertz (Hz)

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2
Q

What is a cycle?

A

One full repetition of the condensation and rarefaction of the molecules.

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3
Q

What is frequency percieved as?

A

Pitch.

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4
Q

What is the range of human hearing in Hertz

A

20 - 20,000Hz

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5
Q

What is a period?

A

Time taken to complete one cycle.

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6
Q

Period and Frequency have an inverse relationship, meaning…

A

As frequency increases, the period decreases (and vice versa). When freq. doubles, period reduces by half.

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7
Q

Formula for Period (T)

A

1/f in Hertz

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8
Q

Formula for Frequency (f)

A

1/T in seconds

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9
Q

What symbol represents wavelength?

A

λ (lambda)

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10
Q

What is a wavelength?

A

Distance of a pure tone traveled in one cycle

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11
Q

Wavelength and Frequency are inversely proportional meaning…

A

Higher frequencies have shorter wavelengths; lower frequencies have longer wavelengths.

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12
Q

What is Starting Phase?

A

The starting point at which a cycle of vibration begins.

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13
Q

What is constructive interference?

A

[When adding waves together] When phases match up with each other.

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14
Q

What is destructive interference?

A

[When adding waves together] When phases are out of phase (line).

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15
Q

What is Amplitude?

A

The magnitude of a sound or how much the molecules are being displaced.

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16
Q

What is Amplitude perceived as?

A

Loudness

17
Q

What is Intensity?

A

Related to the volume or amplitude of a sound or waveform

18
Q

What is Sound Pressure?

A

Measure of force distributed over an area.

19
Q

What is a Decibel?

A

A logarithmic unit (by 10s) to describe intensity of a sound made by Alex Bell.

20
Q

What is the Threshold of the Audibility Curve?

A

A graph that shows the dB SPL needed for the average human ear to detect a sound at a given frequency

21
Q

What does Threshold mean?

A

The softest sound (lowest intensity) a person can hear (perceive)

22
Q

What are complex sounds?

A

Anytime there are 2 or more pure tones, this is a complex sound. They have periodic vibrations.

23
Q

What is a pure tone?

A

Simple periodic vibrations.

24
Q

What are aperiodic sounds?

A

White noise or static. Or voiceless speech sounds.

25
Q

What is filtering?

A

It hinders some frequency and allows others to pass through

26
Q

What is narrow band noise?

A

A special type of bad-pass filtered noise used during audiometric testing.

27
Q

What is resonance?

A

Charactersitic frequency at which an object will vibrate.

28
Q

What are harmonics?

A

Multiples of the fundamental frequency. (f1, f2, f3)

29
Q

What is the vocal tract?

A

An acoustic resonator.

30
Q

What are consonants?

A

Voiced or voiceless sounds. Place of articulation is what it based on.

Audiometry (1 decks)

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