CSD 375- Test 1

In the SI system, the smallest sound pressure variation sufficient to produce an audible 1 KHz. pure tone sound wave for normal human subjects is equal to about _________________ Pascals.

.00002

Which branch of physics studies acoustics?

mechanics

What is the SI unit for length or distance?

meter

How is intensity represented on a time domain spectrograph?

darkness of the marks or brightness of color

A(n)____________________ is a band of vocal tract harmonics displayed in a speech spectrogram when the phonatory source is present.

formant

The array of harmonics in a complex periodic sound source form its...

frequency spectrum

What term describes the energy flow (time averaged energy flux) related to sound pressure and usually described in relation to electronic instruments?

intensity

Which of the following is a fundamental quantity in the SI system?

length

The quantity of time it takes for a periodic sound to complete one cycle is its...

period

The loudness of a sound is related to the physical magnitude of its...

pressure

The decibel is an amplitude...

ratio

The typical length of the "ideal" vocal tract for laboratory analysis is...

17 cm

What are the two main branches of physics?

Classical Physics and Modern Physics

What is the relationship of sound intensity to sound pressure?

Intensity is proportional to the square of pressure.

What is the frequency of a complex periodic sound source?

NOT the frequency of the highest harmonic, not the product of amplitude and frequency

What is the SI unit of force?

Newton

The amount of force acting over a surface is quantified in the SI as...

Newton/Meter2

In physics, the SI measurement unit for work is...

Newtons X meters (Joules)

In physics, a quantity is a...

Property of magnitude or multitude.

The psychological interpretation of a sound's spectrum is called...

Quality or Timbre

What is the difference between speed and velocity?

Speed has no vector; velocity has a vector.

A spectrogram provides a visual representation of sound, including speech, as a function of _________________________.

time

Which of the following is a derived quantity in the SI system?

velocity

On a spectrogram, the _______________________ indicate opening and closing of the glottis during phonation.

vertical striations

Which derived quantity is the measurement unit for intensity?

watts per square meter