**4. Sensors and transducers: energy balance for a human brain**

Your body has feedback systems that regulate the internal environment of your body. The feedback systems make use of storage depots and numerous feedback loops. The monitoring of plasma calcium is a good example of negative feedback. The bones constitute large storage depots for calcium, for the plasma to withdraw these storage supplies in times of need. Our body's homeostatic regulatory systems are represented by feedback loops. The feedback is considered negative, when it is compensating or negates any change. The negative feedback is essential to stabilize a system. The gastrointestinal tract, the lungs, the kidneys, and skin of your body make exchange of materials and energy between the internal and the external environments. A steady state is achieved by regulatory mechanisms involving the balance between the inflow and outflow of the internal environment that stabilizes the composition of the internal environment. The tendency to regulate the internal environment so that it is maintained in a steady state is called homeostasis.

The keeping of face beard (facial hair) and wearing of a knitted head cloth (*patka*) and a turban (*pag*) on your body has a logical and a scientific significance. The daily self-making folds of hair knots and making round folds of turban over the head of your body with colorful cotton cloths has following historical, medical benefits: (i) it indicate, protects and concentrate the disciplinary physical and mental strength of a person; (ii) it gives hair tonic to the growth of hairs on your body due to solar energy;

**133**

*a*

**Table 1.**

*Noise grades and flag colors under limiting conditions.*

*Acoustic Filters for Sensors and Transducers: Energy Policy Instrument for Monitoring…*

(iii) the whole system acts as an acoustic filter and provides immunity to your body; and (iv) the folded *Patka* with style, folded design of hair knots on top of your head is your identity in time domain, the face beard on your body is a measuring ration and a sign of man, the turban with style, color, design is your identity in space domain.

The energy generated by metabolism rate of your body varies considerably with the activity of your body. A unit to express the metabolic rate per unit of area of

for your body while seated quite (called sedentary). The variable which affects the comfort of your body is the type and amount of clothing that you are wearing. The insulation of clothing is defined as a single equivalent uniform layer over your whole body. The insulation value for clothing of your body is expressed in terms

**Table 1** has summarized units of noise and their limiting conditions [8–12].

**Figure 1** has presented a double-sided hexagonal slide rule with seven edges for noise measurement representing seven sources of noise. Reference value used

noise. Positive scale of noise has 10 positive units and one negative unit. Whereas,

*Reference value of G2 = ±U signifies the limiting condition with areas of noise interference approaching to zero.*

**Table 1** has also notated grades and flag colors under limiting conditions.

on positive scale of noise and 1 W m<sup>−</sup><sup>2</sup>


insulation value of 1 clo, whereas a pair of shorts has 0.05 clo.

**5. Results: a slide rule for noise measurement**

), defined as the metabolic rate

on negative scale of

). A heavy business suit with accessories has

*DOI: http://dx.doi.org/10.5772/intechopen.81949*

your body is termed as met (1 met = 58.2 W m<sup>−</sup><sup>2</sup>

of clo units (1 clo = 0.155 m2

for I2 is −1 W m<sup>−</sup><sup>2</sup>

*Acoustic Filters for Sensors and Transducers: Energy Policy Instrument for Monitoring… DOI: http://dx.doi.org/10.5772/intechopen.81949*

(iii) the whole system acts as an acoustic filter and provides immunity to your body; and (iv) the folded *Patka* with style, folded design of hair knots on top of your head is your identity in time domain, the face beard on your body is a measuring ration and a sign of man, the turban with style, color, design is your identity in space domain.

The energy generated by metabolism rate of your body varies considerably with the activity of your body. A unit to express the metabolic rate per unit of area of your body is termed as met (1 met = 58.2 W m<sup>−</sup><sup>2</sup> ), defined as the metabolic rate for your body while seated quite (called sedentary). The variable which affects the comfort of your body is the type and amount of clothing that you are wearing. The insulation of clothing is defined as a single equivalent uniform layer over your whole body. The insulation value for clothing of your body is expressed in terms of clo units (1 clo = 0.155 m2 -C W<sup>−</sup><sup>1</sup> ). A heavy business suit with accessories has insulation value of 1 clo, whereas a pair of shorts has 0.05 clo.
