An ultrasonic and optical waveguide apparatus includes a face plate and an ultrasonic waveguide extending through a portion of the face plate. The ultrasonic waveguide has a hollow interior with an interior diameter tapered along an elongate axis of the ultrasonic waveguide. The elongate axis of the ultrasonic waveguide is oriented orthogonal to the face plate. An optical shield extends through at least a portion of the hollow interior of the ultrasonic waveguide. The optical shield prevents transmission of a portion of light through the hollow interior.

An ultrasonic and optical waveguide apparatus includes a face plate and an ultrasonic waveguide extending through a portion of the face plate. The ultrasonic waveguide has a hollow interior with an interior diameter tapered along an elongate axis of the ultrasonic waveguide. The elongate axis of the ultrasonic waveguide is oriented orthogonal to the face plate. An optical shield extends through at least a portion of the hollow interior of the ultrasonic waveguide. The optical shield prevents transmission of a portion of light through the hollow interior.

An acoustic meta material (AMM) spiral device for passive amplification of sound is described. The AMM amplifier device employs at least one deep sub-wavelength spiral design with high refraction index, based on an exponential spiral shape. The AMM spiral amplifier is used to focus on low frequency sound amplification and to cover broadband frequency range. Sound emanating from a speaker travels into a spiral channel until reaching the apex of the spiral. When twin spirals are used, the sound then enters a second spiral for radiating into open air.

Methods, systems, devices, and products for ultrasonic borehole logging using an ultrasonic borehole imaging tool in a borehole intersecting the earth formation. Methods may include adjusting a focus for an ultrasonic beam generated from a single-transducer ultrasonic assembly of the ultrasonic imaging tool; using a receiver to generate measurement information responsive to an ultrasonic signal caused by the ultrasonic beam; and estimating a parameter of interest from the measurement information. Methods may include adjusting the focus in dependence upon environmental conditions, the environmental conditions comprising at least one of: i) standoff between the ultrasonic imaging tool and a wall of the borehole; and ii) borehole annulus conditions. Methods may include adjusting the focus in substantially real-time. The ultrasonic beam may be focused with a focal zone at the borehole wall configured to produce a beam spot size of a selected diameter.

Methods, systems, devices, and products for ultrasonic borehole logging using an ultrasonic borehole imaging tool in a borehole intersecting the earth formation. Methods may include adjusting a focus for an ultrasonic beam generated from a single-transducer ultrasonic assembly of the ultrasonic imaging tool; using a receiver to generate measurement information responsive to an ultrasonic signal caused by the ultrasonic beam; and estimating a parameter of interest from the measurement information. Methods may include adjusting the focus in dependence upon environmental conditions, the environmental conditions comprising at least one of: i) standoff between the ultrasonic imaging tool and a wall of the borehole; and ii) borehole annulus conditions. Methods may include adjusting the focus in substantially real-time. The ultrasonic beam may be focused with a focal zone at the borehole wall configured to produce a beam spot size of a selected diameter.

Methods and systems are provided for enhancing and delivering engine sounds to a vehicle cabin based on a selected mode. In one example, a method may include adjusting openings of one or more valves fluidically coupling one or more corresponding engine regions to a sound tube of a sound enhancing system based on the selected mode. Throttle opening may also be adjusted to compensate for air routed from the engine regions to the sound tube instead of flowing to the engine cylinders.

A system for improving accuracy of self-detection of a voice includes a first cup element having a forward end configured to contact a human face and a rear end configured to be spaced from a human head on which the human face is located such that the first cup element defines a first void configured to receive a first ear of the human head, the first cup element defining an opening to an environment of the system to provide a pathway for sound waves to travel into the first void. The system further includes a second cup element being a mirror image of the first cup element and defining a second void configured to receive a second ear of the human head.

A stethoscope includes a headset including a first eartube terminating in a first earpiece and a second eartube terminating in a second earpiece, and a chestpiece having a diaphragm. The stethoscope further includes flexible acoustic tubing having a first tubing segment connected to the headset and a second tubing segment connected to the chestpiece. The first tubing segment is manually disconnectable from the second tubing segment, and the first tubing segment is manually connectable to the second tubing segment to align and seal the first and second tubing segments and form an acoustic passageway extending from the chestpiece through the first and second tubing segments and the first and second eartubes to the first and second earpieces. Optionally, the flexible acoustic tubing with the disconnectable and connectable segments may be provided as a replacement component for a stethoscope.

An acoustic component, an acoustic apparatus and an acoustic system are provided. The acoustic component has a pipe, a slot configured on the pipe that has an elongation direction along an elongation direction of the pipe, and a horn extending from a first end of the pipe. The acoustic apparatus includes the acoustic component and further includes an acoustic driver acoustically coupled with a second end of the pipe to radiate acoustic energy carried in waves into the pipe. The acoustic energy carried in waves is radiated to the environment through the slot and the horn.

An acoustic component, an acoustic apparatus and an acoustic system are provided. The acoustic component has a pipe, a slot configured on the pipe that has an elongation direction along an elongation direction of the pipe, and a horn extending from a first end of the pipe. The acoustic apparatus includes the acoustic component and further includes an acoustic driver acoustically coupled with a second end of the pipe to radiate acoustic energy carried in waves into the pipe. The acoustic energy carried in waves is radiated to the environment through the slot and the horn.