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The influence that the disclosure of idling noise exerts on HRV and respiratory frequency
Technical Paper
2000-05-0329
Sector:
Language:
English
Abstract
The sense of a human being is expressed in a word always with
the sensuous evaluation to idling noise. However, due to the sense
of the human being is very complicated basically and be including
delicate elements, there is a limit to express it in a word. Also,
idling noise might be giving a stress to our body, without feeling
it. Then, several studies have been made on physiological
information receive the response of a human being objectively,
tried to evaluate the load of a body.
Electrocardiogram (ECG) and respiratory curve were measured to
examine the influence that the disclosure of idling noise exerts on
the autonomic nervous system function in this study. Heart rate
variability (HRV) was obtained from ECG and respiratory frequency
was obtained from respiratory curve in the analysis. Seven subjects
were adult males who were healthy hearing.
We investigated the result with considering the differences by 4
kinds of noise and 2 kinds of sound pressure. Respiratory sinus
arrhythmia (RSA) frequency was directly proportional to respiratory
frequency and RSA peak value was inversely proportional to
respiratory frequency, without being related to the presence of the
respiratory control. We proposed R&H Method as the analysis
method of HRV, from that respiratory frequency is appearing in
power spectrum of HRV as RSA. These results suggested that R&H
Method which considered the physiological reaction characteristic
of each subject was suited as the analysis method of HRV.
Consequently it is conjectured that R&H Method could estimate
the degree of the mental stress was caused by the disclosure of
idling noise.