| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 3D30.00 | Resonance Cavities | | |
| 3D30.10 | vertical resonance tube | PIRA 200 | Draw a glass tube out of a water bath while holding a tuning fork over one end. |
| 3D30.10 | veritcal resonance tube | 3D30.10 | The length of a glass tube is varied by pulling it out of a water reservoir. A tuning fork is used as a frequency source. |
| 3D30.10 | vertical resonance tube modification | AJP 36(1),ix | Design of a clamp to hold the tuning fork and resonance tube, and a bracket for the water reservoir. |
| 3D30.10 | vertical resonance tube | Se-1 | A glass tube is drawn out of a water bath while holding a tuning fork over one end. |
| 3D30.10 | vertical resonance tube | S-80 | Use a tuning fork to excite the air column in a vertical tube as it is pulled out of a water bath. |
| 3D30.11 | vertical resonance tube | S-112 | Blow across the mouth of bottles or a adjustable air column. |
| 3D30.12 | vertical resonance tube | 19-4.9 | A vertical tube is mounted over a siren disk. |
| 3D30.14 | open tube resonance | S-113 | A length of open tube adjusted by a paper extension and excited by a tuning fork. |
| 3D30.15 | resonance tube with piston | PIRA 1000 | |
| 3D30.15 | resonance tube with piston | Disc 11-01 | Mount a microphone on a piston that slides in a glass tube and close the other end of the tube with a speaker. |
| 3D30.16 | horizontal resonance tube | PIRA 1000 | |
| 3D30.16 | horizontal resonance tube | 3D30.16 | A plunger on a rod is used to change the effective length of a horizontal glass tube as a tuning fork supplies the exciting frequency. |
| 3D30.16 | organ pipe velocity nodes | S-129 | Lower a ring with a membrane and sand into a pipe with a clear side to observe velocity nodes and antinodes. |
| 3D30.17 | modes of a bottle | AJP 56(8),702 | A thorough discussion of modes of various bottles working up to a 3-D model. |
| 3D30.19 | low frequency generator | S-66 | A special tip for an air jet that produces many frequencies of low intensity useful for exciting enclosed air columns. |
| 3D30.20 | open and closed tubes 256/512 | PIRA 500 | |
| 3D30.20 | resonance tube 256/512 | Disc 11-04 | A tube is cut to length to resonate at 256 Hz when closed and 512 Hz when open. |
| 3D30.21 | conical pipes | S-114 | Corrections for the effective length of open and closed circular pipes are given. A conical pipe discussion with several interesting demonstrations is listed. |
| 3D30.35 | bloogles/kroogah tubes | PIRA 500 | |
| 3D30.35 | Hummer tube | AJP 42(4),278 | The complete explanation on singing corrugated pipes. |
| 3D30.35 | freq tube dash pot | Se-7 | A freq tube is attached to coffee can moved up and down in a pail of water. |
| 3D30.35 | freq tube | Se-6 | Open tubes of corrugated plastic are whirled around. |
| 3D30.40 | Hemholtz resonators | PIRA 1000 | |
| 3D30.40 | Helmholtz resonators | Se-3 | A set of spherical resonators made of spun brass. |
| 3D30.40 | Helmholtz resonators | 19-4.5 | A small vane is rotated when placed near the small opening of a resonating Helmholtz cavity. |
| 3D30.40 | acoustic resonator | S-4d.1 | This picture appears to be of a Helmholtz resonator. |
| 3D30.40 | Helmholtz resonators | Disc 11-09 | Two resonators are matched to two tuning forks. |
| 3D30.41 | tuning a resonance box | Sd-3 | The hole size of a resonance box is adjusted to maximize resonance with a tuning fork. |
| 3D30.43 | Fizeau resonance box | S-81 | A toothed wheel is used to produce a high pitched sound and an adjustable resonance box with a sensitive flame detector is used to determine speed of sound. |
| 3D30.45 | ploop tubes | Se-2 | Stoppers are removed from a set of tubes of varying length. |
| 3D30.45 | ploop tubes | S-111 | Pull stoppers out of test tubes filled with water to different depths. |
| 3D30.50 | Ruben's tube | PIRA 500 | |
| 3D30.50 | Ruben's tube | 3D30.50 | The standard Reuben's tube. |
| 3D30.50 | Ruben's tube | Sa-16 | A gas filled tube with flames from a row of holes along the top and a speaker at one end. |
| 3D30.50 | Ruben's tube | 19-3.5 | Directions for building a Ruben's tube. Picture, Diagrams. |
| 3D30.50 | Ruben's tube | S-130 | Drill a line of holes along a downspout and drive one end with a loudspeaker and introduce gas in the other. Flames indicate nodes and antinodes. |
| 3D30.50 | Ruben's tube | S-2h | A horn driver is used as a sound source. |
| 3D30.55 | Rubens tube comment | AJP 54(4),297 | A comment on AJP 53,1110 (1985). |
| 3D30.55 | Rubens tube flame structure | AJP 51(9),848 | An examination of the structure of the flames in the normal mode (flame maxima at pressure nodes). |
| 3D30.55 | Ruben's tube nodes | AJP 53(11),1110 | The pressure is measured at each flame hole and the results are that the flames are larger at the pressure antinodes. |
| 3D30.55 | Ruben's tube nodes | AJP 54(12),1146 | A comment on a note that the tube can be operated with flame maxima at either pressure node or pressure antinode. |
| 3D30.60 | Kundt's tube | PIRA 1000 | |
| 3D30.60 | Kundt's tube | Sa-17 | Sawdust in a tube makes piles when driven by rubbing a rod attached to a disc. |
| 3D30.60 | Kundt's tube | S-82 | Standard Kundt's tube: glass tube with cork dust, stroke a rod to excite air in tube. |
| 3D30.60 | Kundt's tube | Disc 11-03 | Stroke a rod to excite cork dust in a tube. |
| 3D30.61 | horn driven Kundt tube | AJP 30(7),512 | Investigation of striations in an electrically driven Kundt tube. |
| 3D30.61 | Kundt's tube | S-3f | The cork dust in Kundt's tube is excited by a horn driver. |
| 3D30.62 | Kundt's tube | S-127 | A variation of Kundt's tube with an organ pipe made with one side of rubber or cellophane and sprinkled with sand while laid on its side. |
| 3D30.63 | Kundt's tube on the overhead | 19-3.1 | A Kundt's tube is modified for use on the overhead projector. |
| 3D30.64 | evacuate Kundt's tube | TPT 3(1),30 | Show the effect of pressure variation on the speed of sound by partially evacuating the Kundt's tube. |
| 3D30.65 | hot wire Kundt's tube | Sa-18 | Cooling of a glowing wire down the center of a tube indicates standing waves. |
| 3D30.65 | horizontal resonance tube - wire | 19-3.4 | A nichrome wire stretched down the middle of a glass tube and heated electrically will glow to show standing waves. |
| 3D30.65 | hot wire pipe | S-128 | Blow a whistle at one end of a tube with a hot wire running down the axis to show areas of low and high luminosity. |
| 3D30.66 | Kundt's tube - impedence measurement | 19-3.2 | Use the oscilloscope to show variation of impedance in the driving coil with changes in tube length. |
| 3D30.69 | pressure distribution in a cavity | AJP 39(7),811 | Liquid deformation on the bottom of an acoustic cavity shows the time-dependent pressure distribution in a standing sound wave. |
| 3D30.70 | hoot tubes | PIRA 200 | A bunsen burner heats a screen in the bottom of a large open vertical tube. |
| 3D30.70 | hoot tubes | 3D30.70 | Large glass tubes sound when a wire mesh at one end is heated with a Bunsen burner. |
| 3D30.70 | hoot tubes | Se-5 | A Bunsen burner heats a screen in the bottom of a large open tube. |
| 3D30.70 | hoot tubes | S-62 | Singing tubes excited by hot gauze. |
| 3D30.70 | hoot tubes | S-61 | Hints for making a singing tube work with only flame excitation. |
| 3D30.70 | singing pipes | Disc 11-07 | Two metal tubes and a glass one. |
| 3D30.71 | hoot tube | S-4c | Insert a fisher burner in a tube. |
| 3D30.72 | hoot tubes | S-64 | The gauze in a hoot tube is held at the bottom of the tube and the flame is lit above it. |
| 3D30.73 | Rijke Tube - electrical heating | AJP 34(4),360 | Construction of electrically heated Rijke tubes, tuning a T shaped tube. |
| 3D30.74 | variable hoot tubes | PIRA 1000 | |
| 3D30.74 | variable hoot tube | 3D30.74 | |
| 3D30.75 | Knipp tubes | S-63 | Knipp tubes are a special form of singing tube made by holding a short length of glass tube in the closed end of a larger tube. Picture. Ref. F.R.Watson, "Sound"p.214. |
| 3D30.77 | hot chocolate effect | AJP 50(5),398 | Tap on a tall cylinder full of water and then repeat with hot water so there are lots of bubbles. The pitch descends three octaves and rises as the bubbles float up. |
| 3D30.77 | hot chocolate effect - comment | AJP 59(4),296 | A few explanations from a physical chemist. |
| 3D30.77 | hot chocolate effect | AJP 58(11),1033 | Tap on the bottom of an empty glass, a full glass (higher pitch), and a glass full of tiny bubbles (pitch raises as glass clears. Methods of generating bubbles with beer and hot water. More. |