Or simply, do you want to generate sounds and listen to the generated sounds in different frequencies?

However, having conical form the resonator tube must be made longer than a cylindrical tube at the same frequency of the sound to be generated. Low frequency sound can also be found in many notorious haunted locations, although its unexplained nature may be due to earthly vibrations. the resonator tube accordingly should have different diameters at the open and closed ends, respectively. This may be the first controlled insonification of an operational IMS infrasound array from a portable device.I was convinced the incredibly deep deep rumbles were coming from the vast air conditioning pipes far above my head. If the sound is inaudible, you may still be able to feel the vibration, similar to the sensation of a subwoofer. An arrangement in an infrasound generator with a resonator tube (10) open at one end thereof and having a substantially uniform diameter, which communicates at the open end thereof with a space containing heat exchange surfaces of a boiler installation, through an aperture (14) in a wall (13) of said space, c h r a c ¬ t e r i z e d in that the resonator (10) at the open end thereof is provided with a conical diffuser.

This purpose is achieved by the arrangement having obtained the characteristics according to claim 1. Another important issue to the infrasound community is the evaluation of new sensors and the characterization of noise reduction systems, both of which could benefit from a controllable source. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed. Another disadvantage of the device is that the generation of a shock wave requires the interaction of the laser with the working medium to form a plasma that explodes, which causes an increase in temperature and thereby the inability to use the device for a long time.

Switching ON the system will instantly start the generation of the vibrations at infrasound levels and if the volumes are kept sufficiently high, you will find the nearby objects also vibrating and falling down of the shelf quite weirdly - the vibrations being totally “invisible.