# SPPA 4030 Speech Science1 Physical Quantities GOOD LINK

• View
216

3

Embed Size (px)

### Text of SPPA 4030 Speech Science1 Physical Quantities GOOD LINK

• Slide 1
• SPPA 4030 Speech Science1 Physical Quantities GOOD LINK http://www.isd.mel.nist.gov/projects/omacapi/Software/MeasuresAndUnits/Measure sandUnitIntroduction.html
• Slide 2
• SPPA 4030 Speech Science2 Physical Quantities Base quantities vs. Derived quantities
• Slide 3
• SPPA 4030 Speech Science3 Base or Fundamental quantities Quantities that must be measured Base measures from which all others are derived
• Slide 4
• SPPA 4030 Speech Science4 Selected Base Quantities 1. Distance or Length (l) 2. Mass (m) 3. Time (t)
• Slide 5
• SPPA 4030 Speech Science5 Systems of Measure English system: fps system F: foot P: pound S: second Metric system cgs system c: centimeters g: grams s: seconds Metric system (System International) mks system m: meter k: kilogram s: second
• Slide 6
• SPPA 4030 Speech Science6 What is the mass of speech structures? Vocal folds ~ 2 grams combined!! Lips ~ 25-50 grams each Tongue ~ 150 grams
• Slide 7
• SPPA 4030 Speech Science7 What are typical distances moved by speech structures?
• Slide 8
• SPPA 4030 Speech Science8 What is the typical duration of speech events?
• Slide 9
• SPPA 4030 Speech Science9 Scalar vs. Vector quantities Scalar quantities Has only a magnitude Vector quantities Includes more than one piece of information i.e. Magnitude AND direction
• Slide 10
• SPPA 4030 Speech Science10 Area and Volume Area 2-dimensional distance 2 Volume 3-dimensional distance 3 l l l l l
• Slide 11
• 11 Displacement Displacement is a change in position Is a vector quantity Has a magnitude (basic quantity of length) Has a direction Jaw vertical position Time
• Slide 12
• SPPA 4030 Speech Science12 Velocity (v) Rate at which a quantity changes its value v = x/t where v = velocity x = distance t = time May be expressed as average velocity instantaneous velocity Velocity units m/sec (SI) cm/sec miles/hour Velocity vs. speed Volume velocity or flow
• Slide 13
• SPPA 4030 Speech Science13 Velocity (v)
• Slide 14
• SPPA 4030 Speech Science14 Acceleration (a) Rate of change in velocity speeding up or positive acceleration slowing down or negative acceleration a = v/t where a = acceleration v = velocity t = time May be expressed as average acceleration instantaneous acceleration Acceleration units m/sec 2 (SI)
• Slide 15
• SPPA 4030 Speech Science15
• Slide 16
• SPPA 4030 Speech Science16 Force (F) Is a push or a pull on an object F = M*a where F = force M = mass a = acceleration Force (or ) (or ) mass (or ) acceleration Force units Newton (SI) dyne
• Slide 17
• SPPA 4030 Speech Science17 Pressure (E or P) Force distributed over an area E = F/A where E = pressure F = force A = area (x 2 ) Pressure units Pascal (SI) dyne/cm 2
• Slide 18
• 18 = area = force Ways to increase Pressure
• Slide 19
• SPPA 4030 Speech Science19 Work (W) Force applied over a given distance W = F*x where W = work F = force x = distance Work (or ) (or ) force (or ) distance Work units Joule (SI) Erg Footpound
• Slide 20
• SPPA 4030 Speech Science20 Power (P) Power = rate at which work is done Power (P) P = W/t where P = Power W = work t = time Power units Watt (SI) horsepower
• Slide 21
• SPPA 4030 Speech Science21 Area over which power is focused Intensity is to power what pressure is to force I = P/A where I = Intensity P = Power A = area Intensity (I) Intensity units watt/cm 2
• Slide 22
• SPPA 4030 Speech Science22 Resistance acoustic or aerodynamic resistance = pressure/flow In electrical world Ohms Law R=E/I where R= resistance E=voltage I=electric current Note: voltage is an electric analog to pressure

Documents
Documents
Education
Documents
Documents
Documents
Documents
Documents
Documents
Documents
Documents
Documents
Documents
Documents
Documents
Documents
Documents
Documents
Documents
Documents
Documents
Documents
Education
Documents
Documents
Documents
Documents
Documents
Documents
Documents