Table 2 Resonant frequency, S, FoM, Q, and LoD for air and C3H8 gases at different N.

From: Tunable sensing properties of a Helmholtz resonator array featuring a central defect cell with four lateral ducts

\(\:N\)

\(\:{f}_{R}\) (Air)

(Hz)

\(\:{f}_{R}\) (\(\:{C}_{3}{H}_{8}\)) (Hz)

FWHM

(Hz)

S (Hz.s.\(\:{m}^{-1}\))

FoM (s\(\:.{m}^{-1}\))

Q

LoD (m/s)

6

1063.79

779.18

0.974

3.13

3.2

1092

\(\:1.6\times\:{10}^{-2}\)

7

1063.95

779.22

0.442

3.13

7.1

2405

\(\:7.1\times\:{10}^{-3}\)

8

1063.95

779.22

0.207

3.13

15.1

5151

\(\:3.3\times\:{10}^{-3}\)

9

1063.95

779.22

0.097

3.13

32.4

11,020

\(\:1.5\times\:{10}^{-3}\)

10

1063.95

779.22

0.085

3.13

36.7

12,492

\(\:1.4\times\:{10}^{-3}\)