is the vibration available on a common cellphone. Another way of producing tactile sound uses "linear actuators", which move furniture (usually up and down), rather than shaking it. The main advantage of linear actuators is that they deliver actual motion (ground excursion), not just vibration. In the 2010s, tactile sound transducers have evolved to include higher frequencies and produce higher fidelity. The human tactile frequency range is from 1 Hz, very low frequency such as earthquakes, up to 5 kHz in some hearing impaired individuals. For most individuals 2 to 3 kHz is the upper threshold for tactile reception. These 2010s-era devices must have higher resolution than previous "shakers" to produce these frequencies. Most humans have tactile resolution to 2 Hz which is the smallest change in frequency that can be perceived. The primary use for this extended bandwidth is to reproduce the vibratory signature for musical instruments such as violins, guitars, the human voice or sound effects in movies (for example, the speeders in Star Wars). Also higher frequencies may be used to augment hearing through bone conduction, a consideration for people who have compromised their hearing from exposure to loud music. Tactile sound is often used to increase the realism of an artificial environment. For example, mounting a tactile sound transducer in a chair or couch in a home cinema or video game setup can give more of a sense of "being there". For such use, the transducer is often connected to the LFE channel of an A/V receiver. Tactile sound is often used in combination with a subwoofer so that low frequencies can be both felt and heard. To facilitate broadband tactile sound, all channels are summed to provide a full range signal to the transducer amplifier. Graphic equalizers can also be used to further modify the effect. In music For musical performance, drummers will often use a tactile sound transducer mounted on their drum stool so they can "feel" themselves playing, rather than using a more conventional stage monitor. The size and power of a stage monitor required to adequately reproduce low frequency drum sounds would be expensive and hard to transport, while a tactile sound transducer can be rather small and require much less power to get the job done. As well, sound engineers may prefer a tactile transducer over a loud, powerful subwoofer monitor cabinet, because a monitor speaker may produce a lot of