A method of alleviating the sound masking effects of wind noise on a cyclist wearing a safety helmet comprising the following steps: designing an ear cover shield having a generally smooth exterior side; positioning the cover shield adjacent to but generally spaced from an ear of the cyclist so that wind is generally deflected from the ear so that the noise of air rushing over the ear is substantially reduced, and the cyclist is better able to hear proximate sound especially that sound generated...

A listening enhancement device in which a flat body (18) with a ear-hook (14) cutout can be converted to a sound gathering acoustical scoop by engagement of a fastener system located on the body (18) of the device. Once fastened into its functional shape the device can be independently engaged wtih the ear. The device is made in mirror image pairs so one device is specifically for the left ear and the other for the right. The device is reversible as to which side of the body (18) forms the sound...

An acoustic device for mechanically reflecting sound waves into the ear in an undistorted and directionally selective manner has a pair of movable acoustic reflectors constructed, configured and mounted to preserve accurately phase, frequency and image information in the sound waves of interest to the front of the user, secured to a headband or helmet in positions that place the focal points of the reflectors beyond the base of the lenses within the user's ear.

A vane pump includes a pump housing formed with a cylindrical inner space, intake ports and exhaust ports, a rotating shaft rotatably supported by the pump housing, a rotor received in the cylindrical inner space to be rotated by the rotating shaft, a cam ring disposed in the cylindrical inner space, a plurality of vanes held by the rotor to define plural pump chambers between the rotor and cam ring. Fluid sucked from the intake ports is pressurized and discharged to the exhaust ports. The vane ...

A device for improving the hearing acuity of a user directionally, including a pair of reflectors to be supported behind the user's ears so as to increase the effective area of the outer ear and reflect an increased amount of sound energy into the user's ears from a position in front of the user. The reflectors are supported alternatively on a headband or a cap equipped with horizontally extending straps which permit adjustment of the location of each reflector, and the reflectors are attached t...

A hearing aid apparatus comprises a pair of cup shaped members positionable behind the ears of a user and being connected by means of a headband. The cup shaped members form sound reflective surfaces which direct sound waves into the user's ears to thus increase his or her hearing capacity. A modified embodiment of the invention utilizes foam padding in a rear portion of the cup shaped members, and this padding causes a gentle forward bending of the user's ears to further increase hearing abilit...

Closed-cell phenolic foam having a uniform cell structure in which the cell walls are substantially free of both ruptures and perforations is disclosed. The phenolic foam has initial k values of less than 0.15 with substantially no increase of k value over time and good density and compressive strengths. The phenolic foam is prepared by foaming and curing a foamable phenolic resole composition containing an aqueous phenol formaldehyde resole, surfactant, fluorocarbon blowing agent, and optionall...

The present invention is directed to aqueous phenol formaldehyde resoles that have particular application in manufacturing phenolic foam insulation. The resoles are essentially phenol formaldehyde condensation polymers having molar ratios of formaldehyde to phenol of from about 1.7:1 to 2.3:1, preferably from 1.75:1 to 2.25:1 and most preferably about 2:1. The resoles have a weight average molecular weight greater than 800 and preferably from 950-1500. The resoles also have a number average mole...

An acoustic device for amplifying sound is provided and consists of a pair of ear extenders secured to a head band so that the head band may be positioned on a listener's head with the ear extenders transversely in contact with the listener's head behind the ears whereby sounds are amplified and transmitted into the ears.

The invention relates to enhanced heat transfer surfaces and methods and tools for making enhanced heat transfer surface. Certain embodiments include a boiling surface that include a plurality of primary grooves, protrusions and secondary grooves to form boiling cavities. The boiling surface may be formed by using a tool for cutting the inner surface of a tube. The tool has a tool axis and at least one tip with a cutting edge and a lifting edge. Methods for making a boiling surface are also disc...