Numerous experiments on acoustics have already been described in this column, e.g., on the different types of sound or on acoustic beats. The topic of cavity resonance and the determination of the speed of sound from the resonance frequencies of various tubes, glasses, and bottles has also been addressed several times. A topic that has not yet been considered is the recording of a resonance curve. We would like to present here an experimental possibility with very simple devices. Apart from two smartphones, all you need is a wine glass.

1.
J.
Kuhn
and
P.
Vogt
, “
Analyzing acoustic phenomena with a smartphone microphone
,”
Phys. Teach.
51
,
118
119
(
Feb.
2013
).
2.
J.
Kuhn
,
P.
Vogt
, and
M.
Hirth
, “
Analyzing the acoustic beat with mobile devices
,”
Phys. Teach.
52
,
248
249
(
April
2014
).
3.
M.
Hirth
,
J.
Kuhn
, and
A.
Müller
, “
Measurement of sound velocity made easy using harmonic resonant frequencies with everyday mobile technology
,”
Phys. Teach.
53
,
120
121
(
Feb.
2015
).
4.
M.
Monteiro
,
A.
Marti
,
P.
Vogt
,
L.
Kasper
, and
D.
Quarthal
, “
Measuring the acoustic response of Helmholtz resonators
,”
Phys. Teach.
53
,
247
249
(
April
2015
).
5.
M.
Monteiro
,
C.
Stari
,
A. C.
Marti
, “
A bottle of tea as a universal Helmholtz resonator
,”
Phys. Teach.
56
,
644
645
(
Dec.
2018
).
7.
Audio Kit, iOS: https://ogy.de/Audio-Kit.
AAPT members receive access to The Physics Teacher and the American Journal of Physics as a member benefit. To learn more about this member benefit and becoming an AAPT member, visit the Joining AAPT page.