3. A square ventilation duct has a side length of 0.3m. The duct is turned into a Helmholtz band stop filter by drilling a hole in the side of the duct of radius 0.08m which leads to a sealed chamber of volume V. a). If sounds around the frequency of 30 Hz are to be filtered, what volume should the chamber be? b). Calculate the power transmission coefficient at 60 Hz.

3. A square ventilation duct has a side length of 0.3m. The duct is turned into a Helmholtz band stop filter by drilling a hole in the side of the duct of radius 0.08m which leads to a sealed chamber of volume V. a). If sounds around the frequency of 30 Hz are to be filtered, what volume should the chamber be? b). Calculate the power transmission coefficient at 60 Hz.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

In the experiment No.4, the core loss component current is given by_ O Ic Cospo Ic Singo lo Sinoo O lo Cosoo
i need clear ans and solve very very fast in 20 min and thank you | ᴅʏʙᴀʟᴀ ?✨؛
A shunt generator supplies a 30kW load at 215V through cables of resistance, R = 110mn. If the field winding resistance, Rf =680 and the armature resistance, Ra =45mn. Determine the following below: The terminal voltage is, The e.m.f. generated in the armature is,
FM slope detector is a kind of demodulator circuit, how it is demodulated in the receiver?
How can we Verify the relationship between voltage and current in an ac circuit atresonance?
Explain Larmor Frequency? Please answer at your own easy words. Answer should be to the point.
In a 220 Vrms, 60 Hz. Source, determine the following values:
Kindly create a mathematical model / figure of Magnetorheological Dampers for Ground Resonance in Helicopters and provide some explanation on how it functions / works thankyou
(b) The frequency response of Figure Q.2(a) at low-frequency is sketched in Figure Q.2(b). Given that ẞ = 100, VBE = 0.7 V, VT = 26 mV, ro = oo, gm = 42.69 ms and T= 2.34 k fLCE fLC2 fLCI 10 Hz 20 Hz 100 Hz Figure Q.2(b) Frequency response (i) Draw ac equivalent circuit at low-frequency. (ii) Determine the capacitor value for the dominant low cut-off frequency. == (iii) Given that Av=-60, Cwo = 8 pF, Cwi = 6 pF, Cce = 0.1 pF, Cbe =Cx = 100 pF, Cbc Cu=3pF, determine the high cut-off frequency at fнo and fнi. = (iv) Calculate gain in dB and sketch the high-frequency response
hi=33