Sound Vibrations and the Telephone

The initial vibrations of the first heart sound.

The major component of the normal first heart sound is that due to valvular closure. Preceding this there occur low frequency, low amplitude vibrations commonly attributed to auricular systole. It has been shown in this study that such vibrations appear invariably even though the auricles are fibrillating, and in heart block when auricular systole is widely seperated from ventricular systole. I...

Forensic Sound Analyses of Cellular Telephone Recordings

Recordings involving cellular telephones or personal digital assistants (“PDAs”) are increasingly the source evidence in audio forensic examinations, compared to recordings originating with other devices such as hand-held digital recorders. On modern PDA cellular telephones recordings can be made either directly to the telephone or transmitted as voice mail messages. The current investigation f...

Effect of whole body vibrations on sound localization

Influence of wall vibrations on the sound of brass wind instruments.

The results of an experimental and theoretical investigation of the influence of wall vibrations on the sound of brass wind instruments are presented. Measurements of the transmission function and input impedance of a trumpet, with the bell both heavily damped and freely vibrating, are shown to be consistent with a theory that assumes that the internal pressure causes an oscillation of the diam...

The influence of vibrations on perceptual sound attributes: Application to Diesel vehicles

In this thesis work we focus on the influence of seat and steering wheel vibrations on the sound perception of Diesel vehicles, and we try to extract positive characteristics, related to the preference rating. In addition to this multimodal approach, the cross-cultural question between France and Germany is investigated to compare user judgments between two European countries which use many Die...