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C: With Sound Transducer and additional Visual Display via a Lamp
D: Sound Changes
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152. Acoustic-visual signal of a police siren
Close the slide switch (15). The sound of the police siren is heard. At the
same time, the lamp (18) lights up.
153. Acoustic-visual sound of thunder
Connect the points E and F. The sound of thunder is heard. At the same
time the lamp (18) lights up.
154. Acoustic-visual signal of a fire brigade
Connect the points A and B. The sound of a fire brigade is heard. At the
same time the lamp (18) lights up.
155. Acoustic-visual signal of an ambulance
Connect the points B and G. The sound of an ambulance is heard. At the
same time the lamp (18) lights up.
156. Acoustic-visual signal of a vibration
Connect the points B and F. The sound of a vibration is heard. At the
same time the lamp (18) lights up.
157. Light-controlled sound of a police siren
Replace the lamp (18) with the photo-sensor (16) (the same applies to
158 to 161). Close the slide switch (15). The volume of the siren sound
varies with the light intensity.
158. Light-controlled sound of thunder
Connect the points E and F. The volume of the sound of thunder varies
with the light intensity.
159. Light-controlled sound of a fire brigade
Connect the points A and B. The volume of the sound of a fire brigade
varies with the light intensity.
160. Light-controlled sound of an ambulance
Connect the points B and G. The volume of the sound of an ambulance
varies with the light intensity.
161. Light-controlled sound of a vibration
Connect the points B and F. The volume of the sound of a vibration
varies with the light intensity.
162. Slow sound of a police siren
Set the slide switch (15) to ON. Hold down the pressure switch (14). The
loudspeaker (20) slowly emits the sound of a police siren. (If the effect is
not convincing, you can also connect the resistor (30) to the LED (17) in
parallel. Comparison with the original sound is thereby easier).
163. Slow sound of thunder
Connect the points E and F. The loudspeaker (20) slowly emits the sound
of thunder.
164. Slow sound of a fire brigade
Connect the points A and B. The loudspeaker (20) slowly emits the sound
of a fire brigade.
165. Slow sound of an ambulance
Connect the points B and G. The loudspeaker (20) slowly emits the sound
of an ambulance.
166. Slow sound of a gaming machine
Remove the connection C – D. Connect the points A and B. (Here the
resistor connected in parallel to the LED (17) is inconvenient.) The
loudspeaker (20) slowly emits the sound of a gaming machine.
167. Slow sound of a vibration
Connect the points B and F (two discs under each). The loudspeaker (20)
slowly emits the sound of a vibration.
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© Arnulf Betzold GmbH
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