| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 9B18.00 | Sound Detectors | | |
| 9B18.10 | microphones | S-75 | Connecting a carbon-granule microphone to a tube amplifier. |
| 9B18.20 | manometric flames | S-76 | A rubber diaphragm in a device (diagram) controls flame height which is viewed in a rotating mirror. |
| 9B18.20 | manometric capsule | S-3e | A sensitive flame is viewed with a rotating mirror. |
| 9B18.30 | sensitive flame | 17-7.4 | Noise changes a high-calm flame to the turbulent state. Leybold No. 41197. |
| 9B18.30 | sensitive flames | S-71 | Hold copper gauze above a jet and light. |
| 9B18.30 | sensitive flames | S-70 | A hood for a ordinary Bunsen burner (Diagram) that will produce a flame sensitive to sound. |
| 9B18.30 | sensitive flame | S-69 | A flame lit at the end of a glass tube drawn into a fine tip can be tuned to be very sensitive to sound. |
| 9B18.30 | sensitive flames | S-72 | A Bunsen burner with air holes covered and gas pressure reduced becomes sensitive to sound. |
| 9B18.35 | Sensitive liquid jet | S-73 | Make a sensitive jet in an aquarium to show conclusively that the jet and not the flame is sensitive. |
| 9B18.36 | sound amplification with water | 19-9.1 | A tuning fork coupled to a steady water stream breaks it up and the drops fall on a drum head. |
| 9B18.36 | sensitive liquid jet | S-74 | Place a
tuning fork against a nozzle and let the drops hit a drumhead. Couple the
drumhead to the nozzle with a rod for self sustaining oscillations. |
| 9B18.40 | phonodeik | S-78 | Diagrams of four phonodeiks
and one phonelescope. All the devices are acoustic oscillographs using a
diaphragm to move a small mirror. |
| 9B18.40 | phonodeik | S-77 | Cement a small mirror
on a rubber diaphragm on one end of a tube. Reflect light off a rotating
mirror to the small mirror onto a screen. |