| 摘要 |
The sound imitator can be used as a plaything, as aninstrument for sound therapy and for making effects in thesoundtrack of shows and films. It quality imitates the sounds madeby a cricket, is simplified and it reduces electric power costs.The imitator consists of two controllable sound frequencygenerators (1, 2), each first modulation input of which isconnected across a respective resistance (3) to one of theterminals of a standard alternating supply (4). A Graetz circuit(5) with voltage limiting diode (6) in its output diagonal isconnected across reistances (3). A second modulation input of eachof egenerators (1, 2) is connected to the output of the respectivepulse generator-modulator (7, 8). The output of every generator(1, 2) is connected to a matching output of a piezoemitter (9).The output of the Graetz circuit (5) across stabilizer (10) isconnected to the supply inputs of all units (1, 2, 7, 8).1 claim, 2 figures.
|
