Vibrating alert

Under a vibrating alarm is defined as a signal generator, which is signaled by vibration of an event. The user takes this typically through the skin true by wearing the device close to your body.

It is used mainly in mobile telephones for incoming calls or text messages. Here, instead of an acoustic ringing tone ( ring) or in addition to this more or less silent vibrations are triggered. This is especially useful when noise of people present should be avoided by noise or would be easy to hear an acoustic signal due to ambient noise.

In modern mobile phones this signal generator is usually already installed. In devices of older generations could partially retrofitted it with a suitably equipped battery.

Vibrations are typically generated at mobile phone by a small motor, which carries an unbalanced mass. The imbalance makes due to its mass inertia that the housing vibrates. In some mobile phones, the speaker or the earphone is used as a vibration transducer, by being operated at a low frequency. The speaker diaphragm is thus in mechanical vibrations and provides the counterweight is for housing which is vibrated by the inertia of the membrane to vibrate.

The mobile phone maker Nokia has also patented a concept, which can be put tattoos on incoming calls to vibrate. Magnetic waves allow communication of the tattoo with the smartphone. Even individual programming with respect to the type of vibration should be possible, depending on the caller. However, the technology does not work with normal conventional tattoos. The injected under the skin ink must be mixed with iron or iron oxide, so that they can be activated with the help of magnetic waves.

Frequent use will find a wide variety of devices with vibration alarm in people with hearing problems (such as baby monitors, alarm clock, etc.). Another field of application are wristwatches that are used to commemorate the medication or enuresis diurnal.

In the experimental stage are currently vibration alarm systems for the automotive industry. These systems are intended to help the driver to save fuel by vibration in the gas pedal. An electronic information obtained from an enhanced satellite navigation and a radar system in the current traffic situation and derives an economically reasonable speed. If the current speed over the so- determined speed, the driver is alerted by a vibration in the gas pedal.