DE1812502A1 - Device for playing back a teaching program recorded on a sound carrier - Google Patents

Description

Device for playing back a teaching program recorded on a sound carrier The invention relates to an apparatus for reproducing a sound carrier recorded teaching program with manually operated switches to trigger the Operating functions of the device such as forward (playback), rewind and stop.

Basically there is a pre-recorded teaching program on the phonogram generally consisting of several tasks that are solved by the student in succession should be. For example, individual Words, parts of sentences or sentences should be spoken immediately after listening should be followed up by the student. It can also be brage-and-answer games Act.

When playing such teaching programs it is necessary that after listening to a task use the device for a task required to solve the task Time stopped and then restarted to listen to the next task will.

In the known playback devices for sound carriers, for this purpose the student alternately manually actuates the start and stop button. Does the Learn the task at Wiretapping not understood correctly, must he switch the device into reverse and look for the beginning of the task. It goes on the one hand valuable teaching time is lost and on the other hand the student is through the constant operation of the device distracted.

It is possible when recording the teaching program between the to provide longer pauses on the sound carrier for individual tasks, their duration sufficient to solve the task. This eliminates the constant manual going back and forth Switching between start and stop is avoided, but the sound carrier is as a result insufficient use of the many empty spaces. It would therefore be longer running Sound carrier necessary.

In order to eliminate the disadvantages mentioned, a device is the initially described type for programmed teaching according to the invention characterized in that that in addition to the manual switch control, the operating functions of the device as a function can be triggered automatically by the recorded information.

Preferably, for this purpose, the recorded on the sound carrier Information on deliberate pauses of a predetermined minimum duration that the operational functions trigger. Instead of the deliberate, relatively short breaks, you could also predetermined acoustic signals are applied to the sound carrier, which, however, so that the eavesdropping is not disturbed, would have to be filtered out and for their recording additional facilities would be necessary. Breaks that do not have the specified minimum duration are not taken into account and therefore do not trigger any control functions.

The device is expediently scanned from the one that has just been scanned Information following pause of a specified minimum duration stopped and automatically switched back to the forward run after an adjustable time has elapsed. Werner, the device is advantageously designed in such a way that when you return the pause of a predetermined minimum duration preceding the applied information Device switches to forward.

A preferred embodiment of the invention is characterized in that that the information that has just been scanned switches a timer into its readiness and holds it in this position until the specified time has elapsed Minimum duration the timer returns to its rest position. When switching back of the timer, a control process is triggered, which enables the switching of the operating function performs, namely from forward to stop or from reverse to stop or forward The measure that the timer does not stop the control process until after the occurrence of information The advantage that the device can trigger immediately after switching on The pause occurring in the forward or reverse does not respond, even if the pause would be for any length of time.

It is advisable to add another timer after the timer, which is set in motion when the first timer is switched back to its rest position and which has a switching time that can be set over a wide range. To When the set switching time has elapsed, the second timer switches the device to Leader.

Furthermore, the first timing element is dependent on the ratio of the Return to the forward speed automatically switchable, so that it is at increased Return speed to the now delayed pause is specified Minimum duration responds.

According to the invention, the two timing elements preferably control two bistable flip-flops or flip-flops, their output signals according to the corresponding Reinforcement, for example, the switching magnets for moving forward, backward and stopping actuate. The inputs of the bistable flip-flops are also on the hand keys connected.

The teaching device constructed according to the invention offers depending on the position a multi-stage program selector switch, several learning options. Besides the possibility listen to the sound carrier in the conventional, manually controlled start / stop mode, you can as a result of deliberate pauses in speech, for example of two seconds Duration, the device automatically stops at every break. The further start or reverse can be done manually. It is also possible to use the device after the In the event of a pause in speech, it automatically closes again after an adjustable time start. This process is repeated until the teaching program has completely expired is. If you want to repeat a task, you can switch the device to bring the rewind.

At the beginning of the speech you have just listened to, the device will then automatically stopped or switched to forward.

The stop time between two tasks that can be set on the device can be several Seconds, but also minutes. If the student uses this to solve the problem If the time specified by the teacher is not quite needed, he can use the device manually earlier start and listen to the next task.

The device can be used for group teaching as well as for self-teaching be used. It is possible to connect a headphone-microphone combination to the device to connect, which allows a language student, for example, at any time to repeat what has been said and at the same time to listen to yourself in the headphones.

Exemplary embodiments of the invention are described with reference to figures.

Fig. 1 shows the block diagram of a constructed according to the invention Apparatus Fig. 2 is an overview diagram of a similar embodiment the invention.

First, the basic mode of operation of the in Fig. 1 in the block diagram device shown. On one scanned by a tape head 5 Sound carriers can be used for programmed language lessons, for example, with individual sentences, Parts of sentences or words must be recorded. If the device is behind the individual words or sentences are to be stopped, these must be separated by intervals with a specified minimum duration, be separated from each other by two seconds, for example.

During playback or forwards, the one scanned by the sound head 5 is LF voltage after amplification in a preamplifier 6 and a power amplifier 3 reproduced via headphones or loudspeaker 4. At the stop position of the device, the student can use a microphone 1, a microphone amplifier 2 and the amplifier 3 and the headphones 4 listen to their own speech at the same time.

When you press a hand key 10, a bistable toggle or Flip-flop 11 is set, which actuates a pull magnet 13, which then moves the sound carrier into brings the forward movement.

read signal sampled during the forward passes from the sound head 5 through the Preamplifier 6 to a signal half-wave 7. If there is an audio signal, the delivers Signal threshold 7 an output signal that a timing element 8 from its rest position brings into its provision. If there is a pause on the sound carrier, the is greater than the time set on the timer 8, then the timer 8 toggles back to its rest position and emits a control signal at its output, the resets the flip-flop ii. As a result, the advance magnet 13 drops and the sound carrier is stopped. Simultaneously with the resetting of the flip-flop 11, the control signal is set At the output of the timer 8, a timer 9 is in motion. After an adjustable time the timing element 9 also emits a control signal which resets the flip-flop 11, 80 that the advance magnet 13 attracts and the sound carrier returns to the advance movement comes.

When a key 14 is actuated, a bistable trigger stage or a Flip-flop 15 set. When the flip-flop 15 is set, the flip-flop 11 is reset, if it wasn't already reset. The flip-flop 15 controls a pull magnet 17, which brings the sound carrier into the reverse motion.

As with the forward, the reverse also comes from the tape head 5 sampled signal through the amplifier 6 and the threshold 7 to the timing element 8. When In contrast to the forward flow, the output amplifier 3 is fed back by the signal at the output of the flip-flop 15 blocked via the line 12, so that the headphones 4 no audio signal got. Furthermore, the signal at the output of the flip-flop 15 reduces the sensitivity the threshold 7 and switches the timing element 8 to a third of its - in advance used response time. This is due to the compared to the forward speed three times faster return speed. A will now appear on the sound carrier the higher return speed, the shorter the pause, which is greater than that at the timer 8 is the time set, the previously brought into its readiness by the acoustic signal will be switched over Timing element 8 back to its rest position. This will also reset the Plipflop 15, so that the return magnet 17 drops and the sound carrier stops. When tilting back of the timer 8, the timer 9 is set in motion again. After the am Timer 9 set time, the flip-flop 11 is set, so that the sound carrier comes back into the forward movement. If the appears on timer 9 set If the stop time is too long, the sound carrier can also be stopped by pressing the 10 in the forward movement can be brought.

By viticulture one of the control signal at the input of the return magnet 17 controlled switch 18 you can bypass the timer 9, so that the sound carrier can be brought directly from the return movement into the forward movement.

The figure branches off the general circuit diagram of a further embodiment the invention. In the figures, similar circuit parts are given the same reference symbols Mistake. This applies to the microphone 1, the preamplifier 2, the end amplifier 3, the loudspeaker or headphones 4, the sound head 5 and the preamplifier 6.

The circuit parts mentioned work in the case of that shown in FIG Embodiment of the invention in a manner similar to that in Pig. 1 described Block diagram. In the circuit shown in Fig. 2 is between the preamplifier 6 and the output amplifier 3 one from resistors 62 and 63 and from a transistor 64 existing locking stage, which prevents the sound from the tape head 5 sampled signals to the power amplifier and thus to the headphones or loudspeaker 4 arrive.

The low-frequency audio signal voltage is behind the preamplifier 6 transmitted to an amplifier 67 via a resistor 61. Both im stopped State as well as during the return flow takes place through an amplifier 67 connected upstream Attenuation stage from a resistor 65 and a transistor 66 an attenuation of the sampled E3F signal voltage, a transistor connected downstream of amplifier 67 69 rectifies the AF voltage. The rectified voltage controls a Timing element constructed from transistors 24, 26 and 28. This is a transistor 69 downstream capacitor 20 reloaded and thereby the timing element with the transistors 24, 26 and 26 brought from its rest position into its readiness. Possible Interfering pulses that occur drop across a resistor 19. Take a break with a -specified minimum time on, then the capacitor 20 recharges in its original condition around. As a result, the timing element tilts back into its rest position. An RC element consisting of a resistor 25 and a capacitor 22 causes that the tilting process is currently taking place.

When the timer is tilted back, a capacitor 53 turns on Control pulse of a train magnet control circuit with a lead magnet 40 and a Return magnet 41 supplied.

The control pulse causes transistors 48 and 42 to activate the Advance magnet 40 drops so that the Xon carrier stops.

At the same time, when the from the transistors 24, 26 and 28 built-up timer another timer is set in motion, which the transistors 31 and 32 as well as a variable resistor 30 and a capacitor 33 contains. The running time of this second timing element can be determined by the variable resistor 30 can be adjusted over a wide range. After the set Time, the signal emitted by transistor 32 switches one of transistors 36 and 37 built Schmitt trigger. In doing so, one is connected to the Schmitt trigger connected capacitor 39 a control pulse to the train magnet control circuit submitted. via a control transistor 50 and via transistors 48 and 42 the advance magnet 40 is energized again, so that it attracts and the Sound carriers forerunners.

One connected to the base of transistor 42, manually actuatable The start / stop button 43 corresponds to the button 10 shown in FIG a return button 59, which corresponds to button 14 of FIG. 1, pulls the return magnet 41 at. If the device is in the forward direction when you press button 59, will at the same time the transistor 42 is blocked so that the advance magnet 40 falls off. When the transistor 42 is blocked, the transistors 64 and 66 are conductive, so that the Locking level and damping level are effective. Furthermore, the transistor is blocked 42 the pause response time of the first timer with the transistor Ren 24, 26 and 28 switched by a resistor 68.

While the timing element only responds to pauses in advance, the one Have a duration of at least two seconds, there are pauses with a duration when rewinding effective for at least 0.7 seconds. When the first timer is triggered by a Such a pause passes a control pulse to the train magnet control circuit via the capacitor 53. As a result, the current from the return magnet 41 is switched off via transistors 56 and 58, so that he falls away. At the same time, a pulse arrives at the capacitor 45 Transistor 42, so that it becomes conductive and the advance magnet 40 attracts. Through this the device automatically returns from the return line to the Forward switched. With the button 43 the device can alternately start or being stopped.

The mutual locking of the start / stop magnet and return magnet takes place via resistors 57 and 47.

A switch 60 can be attached to the first timer, the State that switches off the time control carried out by the two timing elements. the The operating functions of the device are then controlled exclusively via the Hand buttons 43 and 59.

The circuit diagrams shown in Fig. 2 for the timers and the Pull solenoid control circuits are but one example of numerous embodiments the invention. The same applies to the block diagram shown in FIG. the Timing elements could also be designed mechanically instead of electrical. as well The interlock between the advance magnet and return magnet could be mechanical take place.

Claims (10)

Claims 1. Device for playing back a recorded sound carrier Training program with manually operated switches for reading out the operating functions of the device, such as fast-forward (playback), rewind and stop, are displayed n n s e i c h n e t that in addition to the handheld ¢ holder control, the operating functions can be triggered automatically depending on the recorded information. 2. Apparatus according to claim 1, d a d u r c h g e k e n n -s e i c h n e t that the information recorded on the phonogram deliberate pauses more predetermined Has a minimum duration that triggers the 3Betriebsfrüktionen. 3. Apparatus according to claim 2, d a d u r c h g e k e n n -z e i c h n e t that the pause following a piece of information that has just been scanned is more predetermined Minimum duration triggers the device to switch from forward or from reverse to stop. 4. Apparatus according to claim 2, d a d ur c h g e k e n n -s e i c h n e t that the pause following a piece of information that has just been scanned is more predetermined Minimum time it takes to switch the device from forward to stop or from reverse to triggers the forerun. 5. Apparatus according to claim 3 or 4, d a d u r c h g e k e n n s e i c n e t that the device after the automatic stop after an adjustable Duration switches to the advance. 6. Device according to one of claims 3 to 5, d a d u r c g e k e n n I do not know that the. just scanned information a timer in its Provision switches and holds in this position until after the Pause of predetermined minimum duration the timer returns to its rest position, and that when the timer is switched back, the operating function of the device is switched will. 7. Apparatus according to claim 6, d a d u r c h g e k e n n -z e i c h n e t that when the timer is switched back, a downstream second timer is set in motion and that the second timer after an adjustable Time the device switches to the forward run. 8. Device according to one of claims 6 or 7, d a d u r c h g e k e n n z e i c h n e t that the first timer depending on the ratio of the The reverse speed is automatically switched to the forward speed in this way that it is at the generally higher return speed on the then A shortened pause of a given minimum duration responds. 9. Device according to one of claims 6 to 8, d a d u r c h g e k e n It is noted that two toggle links controlling the forward, reverse and stop control can be controlled both by the two timers and by the manually operated switches are. 10. Device according to one of claims 6 to 9, d a d u sr c h g e k e n n n z e i c h n e t that the sensitivity of a preceding the first timing element Signal threshold as a function of the voltage that occurs during reverse or forward travel entateht, is switched. Blank page