| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 3B25.00 | Impedence and Dispersion | | |
| 3B25.10 | impedance matching - Shive model | PIRA 500 | |
| 3B25.10 | impedence matching - Bell model | 3B25.10 | Two sections of a horizontal torsion machine with different lengths are joined abruptly for unmatched coupling and with a section of gradually lengthening rods for matched coupling. |
| 3B25.10 | wave reflection at a discontinuity | Sa-7 | Two Bell Labs torsion machines with different length rods are hooked together. |
| 3B25.10 | wave coupling | Disc 09-19 | Shive wave machines with long and short rods are coupled abruptly or with a tapered section. |
| 3B25.15 | impedence mismatching in rope | S-24 | Pulses are sent down a cord with part of its length half the diameter of the other part. |
| 3B25.20 | reflection - Shive model | PIRA 1000 | |
| 3B25.20 | reflection - Bell labs | 3B25.20 | |
| 3B25.20 | reflection of waves | Disc 09-17 | A pulse sent down a Shive wave machine reflects from either a fixed or free end. |
| 3B25.25 | spring wave reflection | PIRA 1000 | |
| 3B25.25 | spring wave reflection | Disc 09-18 | Reflections from a long horizontal brass spring with fixed and free ends. |
| 3B25.26 | fixed and free rope reflection | PIRA 1000 | |
| 3B25.26 | fixed and free rope reflection | 3B25.26 | Tie a rope to a bar with a loose knot or tie it to a clamp. |
| 3B25.30 | effect of bell | PIRA 1000 | |
| 3B25.30 | dispersion in a plucked wire | 18-3.5 | A crystal phonograph cartridge attached to one end of a long stretched wire will pick up the reflected waves when plucked. |
| 3B25.35 | acoustic coupling with speaker | PIRA 1000 | |
| 3B25.35 | acoustic coupling | Disc 10-17 | Sound a 2" loudspeaker alone and with an exponential horn. |
| 3B25.40 | soundboard | PIRA 1000 | |
| 3B25.50 | dispersion in a plucked wire | PIRA 1000 | |
| 3B25.51 | slinky-whistler dispersion | AJP 58(10),916 | An analysis of and directions for performing the slinky-whistler dispersion. |
| 3B25.55 | space phone (spring horn toy) | PIRA 1000 | |
| 3B25.55 | space phone | 3B25.55 | |
| 3B25.55 | dispersion | S-54 | A long helical coil of fine wire transmits sound slowly. Speak into a sound box on one end and somewhat distorted sound emerges. |
| 3B25.62 | echoes in a pipe | AJP 36(11),1022 | A 10" dia 85' tube yields five clearly discernible echoes. |
| 3B25.65 | chirped handclaps | AJP 38(3),378 | Clap your hands while standing next to a corrugated wall. |
| 3B25.65 | racquetball court whistlers | AJP 59(2),175 | Whistlers rise in frequency in the racquetball court. |
| 3B25.66 | chirp radar | AJP 41(7),857 | Modify a simple microwave Doppler shift apparatus to study chirp concepts. |
| 3B25.66 | dechirping slinky whistlers | AJP 59(11),1050 | Record a single whistler on the Mac, play it backwards into the whistler-phone, and hear a "ch". |
| 3B25.67 | comment on "culvert whistlers" | AJP 59(2),181 | A comment clarifies the relationship between culvert whistlers and ionospheric whistlers. |
| 3B25.67 | culvert whistlers revisited | AJP 56(8),752 | An analysis of "echo tube" corridor demonstrations that also deals with ionospheric whistlers, tweeks and chirped handclaps. |
| 3B25.67 | culvert whistlers | AJP 39(6),610 | Long article on culvert whistlers. |
| 3B25.80 | shear, Lamb, and Rayleigh waves | AJP 48(8),639 | A panametrics 5022 P/R pulser/receiver driving a piezoelectric transducer in a water bath directed at solid blocks is used with an oscilloscope to show traces of different waves. |