© 2015

Biomedical Signals and Sensors II

Linking Acoustic and Optic Biosignals and Biomedical Sensors


Part of the Biological and Medical Physics, Biomedical Engineering book series (BIOMEDICAL)

Table of contents

  1. Front Matter
    Pages i-xvii
  2. Eugenijus Kaniusas
    Pages 1-90
  3. Eugenijus Kaniusas
    Pages 91-205
  4. Back Matter
    Pages 207-219

About this book


The book set develops a bridge between physiologic mechanisms and diagnostic human engineering. While the first volume is focused on the interface between physiologic mechanisms and the resultant biosignals, this second volume is devoted to the interface between biosignals and biomedical sensors. That is, in the first volume, the physiologic mechanisms determining biosignals are described from the basic cellular level up to their advanced mutual coordination level. This second volume, considers the genesis of acoustic and optic biosignals and the associated sensing technology from a strategic point of view. As a novelty, this book discusses heterogeneous biosignals within a common frame. This frame comprises both the biosignal formation path from the biosignal source at the physiological level to biosignal propagation in the body, and the biosignal sensing path from the biosignal transmission in the sensor applied on the body up to its conversion to a, usually electric, signal.

Some biosignals arise in the course of the body’s vital functions while others map these functions that convey physiological data to an observer. It is highly instructive how sound and light beams interact with biological tissues, yielding acoustic and optic biosignals, respectively. Discussed phenomena teach a lot about the physics of sound and physics of light (as engineering sciences), and, on the other hand, biology and physiology (as live sciences). The highly interdisciplinary nature of biosignals and biomedical sensors is obviously a challenge. However, it is a rewarding challenge after it has been coped with in a strategic way, as offered here. The book is intended to have the presence to answer intriguing “Aha!” questions.


Adverse health effects Apneic sounds Application regions Biomedical instrumentation Biomedical sensing book Biosignal analysis Biosignal monitoring Blood oxygenation Cardiac activity Chestpiece Contacting force and skin temperature Coupling of body sounds Coupling of light Exposure limits Formation of body sounds Formation of optic biosignals Heart sounds Inhomogeneity effects on light Inhomogeneity effects on sounds Light emission Light modulation by physiological phenomena Light sink Light wavelength Lung sounds Microphone Motion artefacts Mutual interrelations of sounds Organs at risk Penetration depth of light Phenomenological physiology Physiological mechanisms Physiological phenomena acoustic biosignals Probing depth of light Propagation of light Propagation of sounds Respiratory activity Snoring sounds Source-sink distance Spatial distribution of body sounds Optic biosignals Stethoscope Transmission and reflection modes Volume effects on light Volume effects on sounds eye and skin

Authors and affiliations

  1. 1.Institute of Electrodynamics, Microwave and Circuit EngineeringVienna University of TechnologyWienAustria

Bibliographic information

Industry Sectors
Health & Hospitals
Consumer Packaged Goods
Materials & Steel


"With knowledge of volume 1, the reader tends to see volume 2 as a continuation. However, I feel that volume 2 can also be seen as an independent text for those who show specific interests in acoustic or optic phenomena since all three levels are addressed here in well balanced ways. Thus I also would like to recommend the book as a very valuable stand-alone work." (Univ.Prof.Helmut Pfützner, Vice-president of TU BioMed, Vienna University of Technology May 2015)