119results about How to "Suppress sound" patented technology

A sound collecting system includes a plurality of microphones, a distance estimation module and an adjustment module. The distance estimation module estimates a distance to a user to accordingly provide a user distance. The adjustment module adjusts a part or all of the positions of the microphones according to the user distance.

A modular emergency shelter system includes a sleeping and storage module having a rectangular box-like structure with curved interior sidewalls defining a sleeping area, and exterior sidewalls extending to an opposing end defining a separate storage area. The box-like structure is preferably fabricated of molded plastic filled with fire resistant and sound dampening foam, and is watertight to keep out the rain and facilitate hosing out after use. Preferably the module includes electronic locking doors operable from inside or outside the module. The module is specially configured for securing together a number of similar structures including additional shelter modules stacked one atop another, or vertically-oriented modular utility units such as toilets, showers and a dressing rooms. Use of the emergency shelter modules is envisioned as including taking reservations electronically over the telephone or Internet, and providing for a particular sleeping module and storage module to unlock the doors later that day.

This invention overcomes the disadvantages of the prior art by providing a power generating system particularly suitable for field use in remote locations, which is fuel-efficient, relatively quiet, tolerant of dust, capable of operating on low grade logistics and diesel-like fuels and capable of generating between 500 W and 2 KW of continuous electrical power. This generator employs a miniature internal combustion engine/generator (MICE) having a piston moving within a cylinder arranged for two-cycle operation, and an interconnected, axially arranged piston shaft that oscillates an alternator coil within a magnetic core. The piston shaft is opposed by a strong, multiple-helix spring. The cylinder head, in which the piston operates, is cooled by moving (electrically pumped) fluid in a cooling head, or by another heat-transfer mechanism. The MICE generator's intake arrangement includes a preheater heated by a heated fluid flow thereon. The MICE generator is vibration-isolated using a base that supports the MICE on a plurality of soft coil springs. The MICE generator is encased in an acoustic enclosure having a shell composed of sheet metal or another stiff material extending from the base plate and being covered by a top side. Holes in the enclosure top are covered by porous discs that allow exhaust gasses from the internal muffler to pass therethrough. The acoustic enclosure resides in a large, typically portable, external package enclosure.

An acoustic panel for sound attenuation employs a septumized cellular core sandwiched between a backsheet and a linear acoustic facesheet. The linear acoustic facesheet employs a linear material layer that impedes acoustic waves entering the core substantially linearly over a wide range of frequencies and sound of pressure levels.

This invention provides methods, devices, and kits for growing a plant or germinating a seed into a plant; methods and devices for delivering oxygen to a plant or a seed which will germinate into a plant; methods and devices for delivering liquid to a plant; methods and devices for increasing the dissolved oxygen concentration in a liquid to be delivered to a plant; methods and devices for increasing the dissolved oxygen concentration in a liquid within a hydroponics device; terraced oxygenators; aspirators, downdraft venturis, net baskets; germination caps, sets of germination caps; methods for increasing the likelihood of germination of a seed; seed-bearing support media; methods for germinating a seed; and smart garden devices for hydroponics growing systems.

A firearm sound suppressor having a one-piece monocore. The monocore comprises a mainframe and a central channel therein which is connected to the mainframe by support arms which form support chambers. The central channel has a circular central bore, through which a projectile passes, and a rectangular external shape with four sides with openings thereon, wherein each side rotates 60 to 120 degrees around the longitudinal axis of the central bore, forming a helical twist in the central channel. The support chambers are attached to connecting members at the circumference of the mainframe. The support chambers and connecting members form the same helical configuration as the central channel, producing a helical flow of propellant gases, coming out of the openings, from the rear end to the front end of the central channel. Compressed propellant gases are prevented from entering the central chamber in front of the projectile. This design improves sound suppression and accuracy of the firearm.

A power seat slide apparatus for a vehicle includes a first rail adapted to be fixed to a vehicle floor, a second rail adapted to be fixed to a vehicle seat and slidably supported relative to the first rail, a screw shaft screwed to a nut member which is fixed to the first rail, the screw shaft including an end portion and a stepped portion, a washer engaged with the stepped portion of the screw shaft, a gear member to which the end portion of the screw shaft is inserted, a fastening member provided at the end portion of the screw shaft, and a gear box fixed to an end of the second rail. The gear box includes a support bracket, a gear housing, and a plate. The stepped portion of the screw shaft is arranged in such a manner that the washer is connected thereto in the gear housing.

A door guard for hotel/motel doors comprises two articles, one article to be attached to a door, and another article to be attached to a door frame. One article is attached to the door, including a hook element adapted to receive a latch member of the door guard and attached to an inside surface of the door; and a damping element, composed of a sound dampening material, attached to an outside surface of the door. Another article is attached to the door frame, including a hinge element for connecting the article to the door frame; and a latch member pivotally connected to the hinge element. Another sound damping element, also composed of a sound dampening material, is disposed between the hinge element and the latch member. When the door guard is released and the door closes, the attached articles reduce the sound and/or vibrations, which are disturbing to hotel/motel guests, that occur when the closing door impacts the door guard and door frame.

This console box is provided with: a box main unit; and a locking mechanism, wherein the locking mechanism is provided with: a locking groove provided on one of the box main unit and the console lid; a locking pin provided on the other of the box main unit and the console lid, the locking pin being fit into the locking groove when the console lid is closed, and having a fitting portion dimension smaller than the groove width of the locking groove; and a biasing device provided between the box main unit and the console lid which biases the console lid in an opening direction by contacting between the locking pin and one of wall formed in the locking grove when the console lid is in a closed state.

A battery cooling structure which cools a battery equipped on a vehicle, the battery cooling structure including: a fan sending an air to cool the battery; and a sound insulation wall including a sound insulation material which insulates noise wherein the sound insulation wall faces an exhaust outlet of the fan.

A bedding climate control apparatus that delivers, in a quiet manner, forced airflow from a fan/blower within a housing to selectively deliver tempered (heated via a thermal element) and untempered (room temperature) air through a flexible hose to bedding. The quiet manner is attained with acoustic foam in the path of incoming airflow to the fan/blower and by oversizing each of the components that create a pressure drop including the capacity of the fan/blower over what is needed to deliver a required amount of airflow. Temperature may be set remotely via a wireless remote control and via a Bluetooth enabled device.

A peripheral device includes at least one active or trigger element housed in a cartridge that is removably mounted. A user can easily remove the cartridge with the active or trigger elements without using special tools. In some embodiments, the peripheral device can include a leveling member between a detection switch and a triggering interface to facilitate effective actuation of the triggering interface and activation of the detection switch from regions spaced from the detection switch. Some embodiments can include silencing or dampening features or structures to minimize or substantially eliminate sound generated upon activation of the triggering interface.