A multi-mode microphone assembly includes a mono microphone, a stereo microphone, and a rotary switch contained within a housing. The mono microphone has a mono input/output mode and the stereo microphone has a stereo input/output mode. Only one input/output mode is active depending on the position of the rotary switch within the housing. When the rotary switch is in a first position only the mono input/output mode is activated and when the rotary switch is in a second position the mono input/output mode is deactivated and the stereo input/output mode is activated. The first position of the rotary switch corresponds to a first position of the housing. The second position of the rotary switch corresponds to a second position of the housing. The first and second positions of the housing are offset 180 degrees from one another.

A head-mounted display assembly with a headphone retention mechanism. The head-mounted display assembly includes a display housing, a headphone assembly, a headphone storage region located on the body of the display housing, and a headphone retention mechanism at the headphone storage region. The headphone retention mechanism includes a magnetic element configured to produce a magnetic field that releasably retains the headphone assembly against the headphone storage region when a user positions the headphone assembly in the vicinity of the headphone storage region.

A surface mount package for a micro-electro-mechanical system (MEMS) microphone die is disclosed. The surface mount package features a substrate with metal pads for surface mounting the package to a device's printed circuit board and for making electrical connections between the microphone package and the device's circuit board. The surface mount microphone package has a cover, and the MEMS microphone die is substrate-mounted and acoustically coupled to an acoustic port provided in the surface mount package. The substrate and the cover are joined together to form the MEMS microphone, and the substrate and cover cooperate to form an acoustic chamber for the substrate-mounted MEMS microphone die.

Thus there is provided a guitar amplifier microphone unit including at least one microphone capsule having a respective microphone capsule holder and a frame for holding the at least one microphone capsule holder. The at least one microphone capsule holder is arranged displaceably and/or rotatably on the frame.

A balanced armature receiver is disclosed that includes a housing and an armature assembly within the housing. The armature assembly includes a first armature portion and a second armature portion. The first armature portion and the second armature portion are operated such that the second armature portion is substantially unstable relative to the first armature portion.

A balanced armature receiver is disclosed that includes a housing and an armature assembly within the housing. The armature assembly includes a first armature portion and a second armature portion. The first armature portion and the second armature portion are operated such that the second armature portion is substantially unstable relative to the first armature portion.

In an acoustic apparatus, an acoustic transducer is arranged in a substrate. Multiple acoustic pathways in the substrate have predetermined lengths, wherein a proximal end of each pathway forms an opening in a front surface of the substrate, and a distal end terminates at the acoustic transducer. The predetermined lengths of the acoustic pathways are designed to form an acoustic spatial filter that selectively passes acoustic signals from or to different locations. The transducer can convert electric energy to acoustic energy when the apparatus operates as a speaker, or the the transducer can convert acoustic energy to electric energy and operate as a microphone.

The present invention provides a microphone device capable of preventing a breakdown of a signal processor, which is provided in a circuit case, processing signals from a microphone unit accommodated in a unit case, and preventing production of noise in a state the unit case is detached from the circuit case. A microphone device 1 includes a unit case 3 accommodating a microphone unit 31, a circuit case 4 accommodating an input terminal receiving signals from the microphone unit, and a signal processor processing the signals input to the input terminal, the unit case 3 being detachably fixed to the circuit case 4, and a detector (38, 44) detecting the attachment or detachment between the unit case and the circuit case. The detector grounds the input terminal in response to the detection of the detachment of the unit case from the circuit case.

An acoustic impedance on a rear acoustic terminal side is set such that satisfactory directionality is obtained even in a high tone range. A rear portion of a sealing member 30A fitted to a unit case 10 is formed in a convex spherical shape, ranging from an apex part 301 to a hem part 302. The sealing member 30A forms an acoustic distributed constant circuit including: a first portion 310 in which a cross-sectional area of a sound path continuously increases, the sound path running from acoustic resistance parts AR as sound holes 28a of an electroacoustic transducer 20 to reach a rear acoustic terminal 12 through an air chamber A; and a second portion 320 on the rear acoustic terminal 12 side in which a cross-sectional area continuously decreases toward a direction farther from a sound pickup source.

An electronic apparatus is disclosed. An electronic apparatus comprises an inner chassis, a microphone that is disposed inside the inner chassis and has a sound collecting surface for obtaining voice, and an outer casing that covers an outside of the inner chassis. The inner chassis includes a sound passing hole penetrating the inner chassis in such a position as to face the sound collecting surface. The outer casing includes an inner surface that faces the inner chassis and an edge that faces the inner chassis with a gap between the inner chassis and the edge. The inner surface includes a sound passing groove that communicates with the sound passing hole. The sound passing groove extends to the edge.