197 results about "Drumhead" patented technology

An electroacoustically-amplified drum assembly consists of a hollow drum shell with a drumhead closing one or both end thereof and an acoustical air vent in the wall thereof. An acoustical microphone is positioned in the drum shell spaced from and free from any connection to the drumhead and has leads for connection through the acoustical vent to an external amplifier and speaker. An adjustable mount is secured on the interior surface of the drum shell without any break in the wall of the drum shell for supporting the microphone. The adjustable mount may be adjusted and set to establish a position for the microphone for minimizing microphone interference and optimizing proximity effect and sound quality. The drum may have air vent hardware positioned in the acoustical air vent opening and including electrical connections for connection to the external speaker and amplifier. The microphone mount may be supported by nuts on the inner ends of lug bolts extending through the drum shell wall for supporting the head tensioning lugs on the outer surface of the drum shell. An alternative embodiment uses magnets one the outer surface of the drum shell cooperating with magnets inside the drum to support the mount adjustably on the drum shell.

An electric musical instrument transducer contains one or more air gapped parallel plate variable capacitors. Each variable capacitor in the transducer has one plate that comprises, covers, or is embedded within an acoustically emitting vibrating surface on a musical instrument (such as a drumhead or soundboard) while the other plate is a rigid surface held a fixed distance away. When the instrument is played, the vibrating surface causes vibrations directly (without using airborne sound as an intermediary) in the non-fixed plates of the variable capacitors, thus causing time-varying voltage oscillations in the variable capacitors that directly reflect the vibrational state, and therefore the sound, of the instrument. These voltage oscillations are then converted to signals that can be used by audio recording and amplification equipment.

A portable electronic drumhead includes a sensor responsive to drumstick impacts in producing electrical signal pulses input to headphones to thereby simulate sounds of an acoustic drumhead. The sensor includes a Force Sensing Resistor (FSR) lamination coated with an electrically conductive polymer ink, a spacer lamination, and a flexible electrode lamination having on an inner surface thereof a pair of interdigitated electrodes, the electrode lamination elastically contacting the FSR lamination in response to drumstick impacts on the outer surface of the electrode lamination or FSR lamination to thus momentarily reduce electrical resistance between the electrodes. Resilient batter pads overlying the laminations muffle sounds produced by drumstick impacts. Optionally, the sensor may have an annular ring shape which may be placed concentrically on the head of an acoustic drum, the sensor having an upwardly protruding resilient bumper strikable to produce electronically synthesized rim shot sounds.

An electronic percussion device includes a drum shell, a drumhead as striking surface, vibration sensors, and a peripheral and a central vibration carrier. The vibration carriers abut against the drumhead to convey vibrations therefrom to the sensor(s). The central vibration carrier is a helicoidal spring. The peripheral vibration carrier is a rigid body of solid material supported by peripheral sensors disposed thereunder. Two electrical leads of each one of the peripheral sensors are correspondingly coupled in parallel to produce only two common output leads. An electronic sound module is configured to sample the sensors and employs software procedures to detect percussion strokes delivered on the drumhead, and to generate sounds accordingly. The software procedures use averaged and aggregated signals to provide accurate detection of position and intensity of a drum stroke. Alternative embodiments of the device use only a peripheral vibration carrier or only a central vibration carrier.

The present invention includes an apparatus and corresponding method for fluid flow control in microfluidic applications. A microchamber, filled with a fluid, is in fluid contact with a flexible plate. A transducer is acoustically coupled to the flexible plate. A function generator outputs a signal to excite the transducer, which in turn induces drumhead vibration of the flexible plate, creating a flow pattern within the fluid filled microchamber.

A tunable drum is shown having a hollow drum shell, and imperforate drumheads closing the ends of said drum shell. One or more opening extend through the drum shell for acoustic venting, and valves are provided for adjusting the size of the openings to vary the amount of acoustic venting, and consequently the volume, pitch, tone, timbre and stick response of said drum. The valves may be slide valves movable, e.g., slidable or pivotable, between an open and a closed position. A preferred valve consists of a ring member positioned for rotation inside said drum and slidable endwise of the drum to cover or uncover said drum openings, or the ring member may have openings that match the drum openings and operable to cover or uncover the openings or rotation. A handle for rotation of the ring member extends outside the shell for movement by the drummer.

A bowl-shaped cover (1) with a hole at the bottom replaces the cover with a sound hole of the conventional earphone, thus creating a constant space. The earphone sound vibrates the cover (1) by beating the inside of the cover (1) and then the vibration is transmitted to a rubber drumhead (vibrating membrane) (2) which is attached onto the cover (1). The rubber drumhead (vibrating membrane) (2) of the earphone works as a soft earmuff and makes wearing feel soft and comfortable. The present invention relates to the earphone that converts sound into vibration and also isolates sound.

A drumhead for use in a percussion instrument is composed of multiple (e.g., two or three) plies of synthetic resin films, which are laminated together and are brought into close contact with each other when stretched across the opening of a hollow cylinder of a drum, for example. At least one air evacuation hole is formed at the center of the backside synthetic resin film or in proximity to the center of the backside synthetic resin film. Therefore, when the drumhead is stretched outwardly along a diameter direction of the opening of the hollow cylinder of the drum, remaining air between the films can be reliably evacuated from the air evacuation hole towards the exterior of the drumhead. Thus, it is possible to reduce unwanted loss in transmission of vibration between the films of the drumhead when beaten; hence, it is possible to realize good sound quality in the drum.

A drumhead tone control device employs an annular configuration of polyester film tightly adhered to the periphery of a drumhead membrane. The annular configuration of the tone control device includes radial and / or circumferential relief. The relieved tone control device disrupts transmission of vibrations reflected from the drumhead membrane / drum shell interface. Disruption of reflected vibrations improves the overall tonal quality of the drumhead while use of a tightly adhered polyester sheet close to the periphery of the drumhead playing surface minimizes undesirable alteration of the attack characteristics and fundamental tone of the drumhead.

Some embodiments provide a drum structural framework comprising a top shell mount, bottom shell mount, rod holders, and tension rods. The top shell mount and bottom shell mount are mounted to either ending edge of a drum shell disposed between the two mounts. A first set of the rod holders are coupled to the top shell mount and an aligned second set of the rod holders are coupled to the bottom shell mount. The tension rods link the two sets of rod holders without hindering resonance of the drum shell. Tuning assemblies on the rod holders adjust the distance separating the top shell mount from the bottom shell mount, thereby controlling the force imposed on the drum shell. Each rod holder includes one or more dampeners that isolate energy passing from the drumhead to the shell from also reverberating throughout the structural framework of the tension rods and rod holders.

An improved drumhead comprising a substantially annular hoop having a generally planar upper member spaced apart from a generally planar lower member, a circumferential inner rim and a circumferential outer rim. Also provided is a film material or membrane for constituting a drumming surface, which extends flat across the area defined within the circumferential inner rim and the circumferential outer rim. Integrally formed with the film material or membrane of the drumming surface is an annular shoulder, which extends at its base between the planar upper and lower members in a co-planar orientation with the annular hoop. The drumhead is adaptable for use with a large variety of percussion instruments including toms, snare drums, bass drums, tambourines, congas, bongos and many other types of ethnic and other drums.

Apparatus and method of measuring acoustic properties of a drumhead of a drum are disclosed. The acoustic properties are measured by exciting the drumhead with a source of energy and detecting the acoustic energy emitted by the drumhead. The acoustic energy emitted by the drumhead may be measured using a microphone or other acoustic sensor. The use of multiple energy sources provides isolation of acoustic energy and allows measurement of local resonance of the drumhead.

A snare strainer includes first and second strainers for respectively holding both ends of a snare assembly (i.e., snares), which is controlled to move in close contact with or apart from a bottom-side drumhead of a snare drum. The first strainer includes a fixed base and a snare stretching member, which further includes a holding member for holding a snare connection member, an interconnection member, a pair of arms attached to both ends of the interconnection member, a pair of levers respectively attached to the arms, and a stretching rod that is bridged between the levers to support the intermediate portion of the snare connection member. The first strainer further includes a tension adjuster for adjusting the tension of the snare connection member, and a height adjuster for adjusting the height of the stretching rod.

An apparatus for tightening a drumhead having a rim and a skin set on a drum body portion. The apparatus utilizes an annular member having a track. A fastener is also employed for holding the annular member relative to the drum body. A retainer is provided and includes a surface for engaging the rim of the drumhead with at least one projection which engages the track of the annular member. The retainer is capable of rotating to move the projection along the track to loosen or tighten the skin of the drumhead through contact with the drum body.

A device for dampening a vibratable surface, such as a drumhead. By dampening the vibrations of a vibratable surface, such as a drumhead, the tone may be altered, as by removing some of the higher pitched overtones of the vibratable surface. The patch comprises a resilient, pliable adhesive body that has an intrical, flexible. And a preferred embodiment, the body is substantially oil free polyurethane mix and the flexible base is foam. A method of manufacturing the patch is provided. The method includes a step of combining, on a flat top surface such as a table, a curable liquid mix and an open cell foam, and allowing the mix to cure.

The present invention is directed to a laminated decorative wood drum shell with incorporated lugs having a smooth central cavity and the unique laminating process involved in the fabrication. A variety of hardwoods in varying colors and thickness will be use to construct the drum shell. Conventional threaded inserts will be inserted into the top and bottom of the lugs providing an attachment means for the top and bottom drum hoops or rims eliminating other attachment hardware while reducing the overall weight of the completed drum yet increasing both the structural integrity and durability, and enhancing the overall tonal quality of the drum. The top drumhead skin can be tightened separately from the bottom allowing for separate tuning of the heads.

A bass drum 10 has a hollow cylindrical shell 11, a drumhead 12 mounted on an opening end of the shell 11 to form a striking surface, and a striking surface attachment 13 provided on the reverse side of the drumhead 12. The striking surface attachment 13 is formed of an elastic sheet. At least a part of an outer area of the striking surface attachment 13 is fixed to the drumhead 12 and a central area of the striking surface attachment 13 is not fixed to the drumhead 12. As a result, the bass drum 10 can generate a struck sound having both deep bass sound and clear attack.

A drumhead with an outer ring member anchored to the outer periphery of a drum and having a threaded interior surface. An inner ring member having a threaded exterior surface matingly threaded to the interior surface of the outer ring.Rotating the inner ring in a first direction relative to the outer ring, increases the tension exerted on the drum skin. Similarly, rotating the inner ring in a second direction relative to the outer ring, decreases the tension exerted on the drum skin.Vertical pressure is exerted on the drum skin and drum ring when the inner ring is rotated in a first direction relative to the outer ring. Conversely, the pressure is released on the drum skin and the drum ring when the inner ring is rotated in a second direction relative to the outer ring.

A snare strainer adapted to a snare drum comprises first and second strainers, which are attached to opposite positions on the exterior circumferential surface of a drum cylinder and by which a snappy member including snares is controlled to move in close contact with or separate from the backside drumhead upon operation of a switch mechanism. One end of an interconnection member included in the snappy member is held between first and second holding members of the first strainer, and the other end is held between third and fourth holding members of the second strainer. A tension adjustment screw is operated to adjust tension applied to the snappy member, which can be visually observed using the scale. Hence, it is easy for the human operator to attach and replace the snappy member and to replace the backside drumhead with another drumhead in a short period of time.

A drumhead tuning rim apparatus for securing and tuning a drumhead on a drum shell of a drum, the apparatus comprising a plurality of housing grooved bearing wheels rotatably installed spaced along a rim of the drum, the rim being configured for seating over the drumhead on the drum shell, a plurality of lug grooved bearing wheels configured to be rotatably installed spaced about the drum shell substantially between the respective housing grooved bearing wheels, a tensioning cable configured for alternately passing between and about respective housing grooved bearing wheels and lug grooved bearing wheels substantially about the perimeter of the drum shell, and a means for selectively adjusting the tension in the tensioning cable.

A snare drum includes a strainer system which switches the position of a snare wire between an OFF position spaced from a lower drumhead and an ON position in contact with the lower drumhead. The strainer system includes a frame to which the snare wire is attached, and a pair of link mechanisms which are joined to the respective end portions of the frame and attach the respective end portions of the frame to a shell of the snare drum. After switching the position of the snare wire to the ON position, the position of the snare wire with respect to the lower drumhead is adjusted by operating an adjust screw of the second link mechanism.

A bass drum mute and a muted drum comprise a pad having a first face including a resilient first surface for bearing on the drumhead membrane and an opposite, second face including a second surface for receiving impacts from a beater. A mounting assembly is simultaneously engagable with the pad and the drum hoop or shell, for holding the first surface of the pad in fixed position bearing against the membrane while the second surface is exposed to the beater. The pad preferably comprises a block of self-supporting resilient material such as foam rubber with a striking region of firmer material. A channel spans the pad, with a cross bar insertable in the channel and having free ends extendable beyond the channel. A mounting end effector such as a clamp or suction cup is located on each free end of the cross bar, for attachment to the hoop or shell.

A quick disconnect that enables a drummer to quickly remove and apply tension to a drumhead of a drum is provided. The disconnect is operable with many types of drums, such as a conga drum. The disconnect allows a drummer at the end of a playing session to quickly release tension from the drumhead and thereby preserve the head and the barrel portion of the drum. Further, when the drummer wants to use the drum again, the quick disconnect allows the drummer to quickly reapply tension to the drumhead, wherein the tension reapplied is substantially the same as the tension applied immediately prior to the previous release of the disconnect.

A device for dampening sounds produced by a drumhead of a musical drum having a drumshell comprising a frame assembly having a first elongated bar member with a first channel and a second elongated bar member with a second channel. The two bar members are disposed in opposed spaced apart parallel relation. Mounting brackets are affixed and secured to the two bar members at their opposing ends. Attached, respectively, to the two mounting brackets between the two bar members are the opposing ends of an assembly of snare wires. The mounting brackets are also provided to connect the assembly to the drumshell and are vertically adjustable between a high tension position such that the snare wires are moved to press against the drumhead and a lower tension position in which the wires are caused to relax to enable the release of tension of the wires against the drumhead. The dampening member has end components adapted to fit slidably into the first and second channels, respectively, to enable the dampening member to be movable between the two elongated bar members along the frame assembly in physical contact with the snare wires to adjust the tension of the wires against the drumhead to produce a variety of sounds. The dampening member is comprised of a base member, a device for physically contacting the snare wires as it is moved along the frame assembly and a resilient material situated between the base member and the contact device to buffer vibrations produced by the struck drumhead.

The invention relates to a background audio determination method and device, a video editing method and device and computer equipment. The background audio determination method comprises the steps that a content time length sequence corresponding to target content is acquired, wherein the playing time length of content segments of the target content form the content time length sequence accordingto a content playing sequence; a drumbeat time interval sequence corresponding to each candidate audio is acquired, wherein the interval lengths between the drumheads in each candidate audio forms a corresponding drumhead time interval sequence according to the sequence of the drumheads in the candidate audio; target similarity between the content time length sequence and the drumhead time interval sequence corresponding to each candidate audio is acquired; and background audio corresponding to the target content is determined from a candidate audio set according to the target similarity corresponding to the candidate audios. Background audio recommendation can also be performed through the target similarity and a recommendation model based on artificial intelligence. By adopting the method, the matching degree of audio selection can be improved.

A drumhead assembly comprising a drumhead membrane fixed within an annular ring and a tensioning ring for tensioning the membrane, located within the annular ring and against the drumhead membrane, comprising a cylindrical rod formed in a circular, flat configuration and a tensioning member for maintaining the tensioning ring in a pre-tensioned configuration. The tensioning member can be adjustable, as in the form of a turnbuckle, so as to vary the diameter of the tensioning ring, or fixed, as in the form of a spacer, so as to maintain the tensioning ring at a predetermined diameter.

A practice drumhead assembly including a mesh membrane held in substantially fixed relation to an acoustic membrane. The assembly preferably includes an annular tensioning ring for tensioning the mesh membrane, and an engagement member for substantially fixing the mesh membrane relative to the acoustic membrane. The tensioning ring includes a cylindrical rod with a turnbuckle that is rotated to increase the diameter of the tensioning ring.

A silent drumhead, comprising:more than one layer of thin-film drumhead having a plurality of through-holes distributed throughout thereon;wherein the silent drumhead is formed by laminating the more than one layer of thin-film drumhead together; andwherein the more than one layer of thin-film drumhead are adhered together by means of an adhesive layer(s) therebetween.By using the plurality of through-holes to exhaust the air underneath the drumhead, vibrations generated when the drumhead is beaten are effectively reduced. This can mitigate the acoustic resonant effect of the drum shell to reduce the sound level when the drumhead is beaten. Furthermore, the thin-film drumheads that have been used in conventional drums can feed back the touch sense of beating in a totally realistic way to effectively overcome the shortcoming of conventional woven silent drumheads that they provide poor touch sense of beating.