Standards Committee

Test Methods (TM's)

These documents provide detailed instructions for component ("part") measurement.

Some of these documents have already been produced by other organizations (ASTM, ISO, etc.) so our first effort will

be to locate all existing and relevant TM's (variously termed: Standards, Specifications, Work Instructions, etc.).

However, if none exist for a particular measurement, we will create ALMA International Test Methods. TM's for spiders are approved for release and will soon be posted on the ALMA website. Draft TM's for cones exist, but need to be updated/revised. We obtained volunteers to create TM's for dust caps, (tweeter) domes/diaphragms, voice coils, padrings, whizzers, grill cloth, preconditioning and measurement conditions, and dynamic measurement of loudspeaker suspension component stiffness.

TM-100 - Test Method for Measurement of the Lowest Resonance Frequency of Loudspeaker Cones

TM-100

TM-100 comments by Bob True 1-8-03.pdf

TM-104 – Test Method for Measurement of Diaphragm Neck I.D.
TM-104 rev DRAFT.pdf

TM-114 – Test Method for Measurement of Diaphragm Body Mass
TM-114 rev DRAFT.pdf

TM-138 – Test Method for Measurement of Diaphragm Assembly Mass
TM-138 rev DRAFT.pdf

TM-213 – Test Method for Measurement of Dust Cap Mass
TM-213 rev DRAFT.pdf

TM-406 – Test Method for Measurement of Spider Neck I.D.

TM-406 rev DRAFT.pdf

TM-324 - Test Method for Voice Coil Maximum Operating Temperature (TMO)

TM-324 rev DRAFT.pdf

TM-438 – Test Method for Measurement of the Stiffness of Loudspeaker Driver Suspension Components
TM-438.pdf

TM-500 SERIES – Test Methods for Padrings
TM-500 SERIES.pdf

TM-600 SERIES – Test Methods for Screens
TM-600 SERIES.pdf

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