Headphone extension system

In an embodiment, a music playing and listening apparatus comprising at least one speaker, at least one audio input receiver, at least one audio output interface at least one amplifier, and at least one power source.Published versio

Virtual acoustic system with a multichannel headphone

The performance of current virtual acoustic systems is highly sensitive to the geometry of the individual ear at high frequencies. The objective of this paper is to study a virtual acoustic system which may be not sensitive to individual ear shape. The incident sound field around the ear is reproduced by using a multichannel headphone. The results of computer simulations show that the desired sound pressure at the eardrum can be successfully replicated in a virtual acoustic environment by using a multichannel headphone

Influence of headphone position in pure-tone audiometry

International audiencePure-tone audiometry (measurement of absolute thresholds using pure tones) is the main test for the diagnosis of hearing loss. It can be achieved by using either air conduction (with headphones or loudspeakers) or bone conduction (by placing a vibrator on the mastoid bone behind the ear). The HeadPhone Transfer Function (HPTF) describes both the headphone response and the coupling to a listener's ear. Recent papers indicated that modifications of headphone position can lead to changes in HPTF, and that these spectral modifications can be audible. The aim of the present study is to determine whether the headphone placement over a listener's ears has an influence on pure-tone audiometric tests. Audiograms were performed several times on normal-hearing subjects, for different headphone positions (obtained by placing/removing the headphone over the listener's ears), the absolute thresholds measurements being repeated for each headphone position. The dispersions of absolute thresholds with and without modification of the headphone position were compared in order to determine whether the headphone positioning is an issue for audiometric tests

Not Aborting My Plan

I was walking on campus today, backpack tight against my shoulders, one headphone in my ear, phone in my back pocket, when I saw a poster calling me a baby killer. [excerpt

Active noise control on high frequency narrow band dental drill noise: Preliminary results

Dental drills produce a characteristic noise that is uncomfortable for patients and is also known to be harmful to dentists under prolonged exposure. It is therefore desirable to protect the patient and dentist whilst allowing two-way communication. A solution is to use a combination of the three main noise cancellation methods, namely, Passive Noise Control, Adaptive Filtering and Active Noise Control. Dental drill noise occurs at very high frequency ranges in relation to conventional ANC, typically 2kHz to 6kHz and it has a narrow band characteristic due to the direct relation of the noise to the rotational speed of the bearing. This paper presents a design of an experimental rig where first applications of ANC on dental drill noise are executed using the standard filtered reference Least Mean Square (FXLMS) algorithm. The secondary path is kept as simple as possible, due to the high frequency range of interest, and hence is chosen as the space between headphone loudspeaker and error microphone placed in the ear (input of the headphone loudspeaker and the output of the error microphone). A standard headphone loudspeaker is used for the control source and the microphone inside of an “Ear and Cheek Simulator Type 43AG” is used as the error microphone. The secondary path transfer function is obtained and preliminary results of the application of ANC are discussed

Audio bass resonator

A headphone comprising: at least one speaker housing comprising at least a first surface with a first opening and a second surface with second opening; at least one resonator designed to cover at least a portion of the second opening of the second surface; at least one speaker, at least a portion of the speaker disposed within the speaker housing proximate to the first opening of the first surface of the speaker housing.Published versio

Headphone holder

FIG. 1 is a perspective view of the headphone holder in accordance with the new design; FIG. 2 is a front view thereof; FIG. 3 is a back view thereof; FIG. 4 is a right side view thereof; FIG. 5 is a left side view thereof; FIG. 6 is a top view thereof; FIG. 7 is a bottom view thereof; and, FIG. 8 is an alternative perspective view of the headphone holder. It is understood that the broken lines are for illustrative purposes only and form no part of the claimed design.Published versio

Effect of headphone position on absolute threshold measurements

International audiencePure-tone audiometry (measurement of absolute thresholds using pure tones) is the main test for the diagnosis of hearing loss. The aim of the present study is to determine whether the headphone placement over a listener’s ears has an influence on pure-tone audiometric tests, for a large frequency range, for Sennheiser HD600 and Telephonics TDH39 headphones. Audiograms (with 1 dB step, and including 10 frequencies up to 14 kHz) were performed several times on normal-hearing subjects, for different – or not different – headphone positions (allowing to dissociate between effects of headphone position and cognitive factors). Globally, the results seem to indicate that the reliability without headphone removing was quite close to the one observed with removing. The influence of removing did not appear more crucial for high frequencies. The rare frequencies for which a removing effect was seen seem to be function of the headphone model. Finally the results were quite different among the subjects

Headphone with in-axle cord connector

A headset including a headband having two end portions each coupled to a respective speaker housing. One or both of the end portions includes a cord connector or jack wherein an audio cord may be coupled. The cord connector is arranged on the headband in a manner such that movement a speaker housing coupled to the headband does not result in tangling of the audio cord.Published versio