![Helmholtz Resonator d = 40 mm, 1003522 [U8430330], Sound](/imagelibrary/U8430330/U8430330_01_Helmholtz-Resonator-d-40-mm.jpg)
![Helmholtz Resonator d = 40 mm, 1003522 [U8430330], Sound](/imagelibrary/U8430330/U8430330_02_Helmholtz-Resonator-d-40-mm.jpg)
![Helmholtz Resonator d = 40 mm, 1003522 [U8430330], Sound (Small)](/thumblibrary/U8430330/U8430330_01_50_50_Helmholtz-Resonator-d-40-mm.jpg)
![Helmholtz Resonator d = 40 mm, 1003522 [U8430330], Sound (Small)](/thumblibrary/U8430330/U8430330_02_50_50_Helmholtz-Resonator-d-40-mm.jpg)
Hollow glass bulb with a narrow tube leading out for demonstrating acoustic resonance. The fundamental oscillation is generated by blowing into the opening or banging on the outside of the bulb.
The elasticity and inertial mass of the air in the bulb cause the bulb to act as an acoustic resonator with a highly distinct resonant frequency. The frequency is dependent on the dimensions of the bulb and the tube. With a whole set of Helmholtz resonators it is possible to demonstrate how tones combine to form a tonal mixture.
Opening on the glass bulb: 14 mm dia.| Weight | 0.009 kg |
![Acoustics Kit, 1000816 [U8440012], Basic Laboratory Kits](/thumblibrary/U8440012/U8440012_01_140_140_Acoustics-Kit.jpg)
![Helmholtz Resonator d = 34 mm, 1003523 [U8430340], Sound](/thumblibrary/U8430340/U8430340_01_140_140_Helmholtz-Resonator-d-34-mm.jpg)
![Helmholtz Resonator d = 52 mm, 1003521 [U8430320], Sound](/thumblibrary/U8430320/U8430320_01_140_140_Helmholtz-Resonator-d-52-mm.jpg)
![Helmholtz Resonator d = 70 mm, 1003520 [U8430310], Sound](/thumblibrary/U8430310/U8430310_01_140_140_Helmholtz-Resonator-d-70-mm.jpg)
![Metallophone, 1000804 [U8430290], Sound](/thumblibrary/U8430290/U8430290_01_140_140_Metallophone.jpg)
![Vibration generator -
for investigating oscillations and resonances, 1000701 [U56001], Oscillations](/thumblibrary/U56001/U56001_01_140_140_Vibration-generator-for-investigating-oscillations-and-resonances.jpg)
![Tuning Forks Kit (440 Hz), 1002612 [U10120], Tuning Forks](/thumblibrary/U10120/U10120_01_140_140_Tuning-Forks-Kit-440-Hz.jpg)
![Chladni plate, circular -
for generating acoustically excited Chladni figures, 1000705 [U56005], Oscillations](/thumblibrary/U56005/U56005_01_140_140_Chladni-plate-circular-for-generating-acoustically-excited-Chladni-figures.jpg)
![Chladni Plate, Square -
for generating acoustically excited Chladni figures, 1000706 [U56006], Oscillations](/thumblibrary/U56006/U56006_01_140_140_Chladni-Plate-Square-for-generating-acoustically-excited-Chladni-figures.jpg)
![Tuning Fork 21 Hz with Plotter Pen, 1000805 [U8431030], Tuning Forks](/thumblibrary/U8431030/U8431030_01_140_140_Tuning-Fork-21-Hz-with-Plotter-Pen.jpg)
![Accessories for Spring Oscillations, 1000703 [U56003], Mechanical Waves](/thumblibrary/U56003/U56003_01_140_140_Accessories-for-Spring-Oscillations.jpg)
![Demonstration Monochord, 1002959 [U15100], Sound](/thumblibrary/U15100/U15100_01_140_140_Demonstration-Monochord.jpg)
![Cork Powder, 10 g Bottle, 1000815 [U8432850], Sound](/thumblibrary/U8432850/U8432850_01_140_140_Cork-Powder-10-g-Bottle.jpg)
![Microphone probe, long, 1017342 [U8498282], Sound](/thumblibrary/U8498282/U8498282_01_140_140_Microphone-probe-long.jpg)
![Stainless Steel Rod 1500 mm, 1002937 [U15005], Rods](/thumblibrary/U15005/U15005_01_140_140_Stainless-Steel-Rod-1500-mm.jpg)
![Helical Spring Snakey, 1008687 [U30034], Mechanical Waves](/thumblibrary/U30034/U30034_01_140_140_Helical-Spring-Snakey.jpg)
![Resonance Wire, Ring Shaped, 1000707 [U56007], Mechanical Waves](/thumblibrary/U56007/U56007_01_140_140_Resonance-Wire-Ring-Shaped.jpg)
![Rolling Pendulum -
a simple mathematical pendulum, 1017332 [U8498293], Oscillations](/thumblibrary/U8498293/U8498293_01_140_140_Rolling-Pendulum-a-simple-mathematical-pendulum.jpg)
![Microphone probe, short, 4008308 [U8498307], Sound](/thumblibrary/U8498307/U8498307_01_140_140_Microphone-probe-short.jpg)
![Motor, 12 V DC, 1001041 [U8552330], Mechanical Waves](/thumblibrary/U8552330/U8552330_01_140_140_Motor-12-V-DC.jpg)
![Holder for Plug-in Components, 1018449 [U8557220], Stand Material: Clamp, Crocs and Accessory](/thumblibrary/U8557220/U8557220_01_140_140_Holder-for-Plug-in-Components.jpg)