DIN ISO 389:1988-09
Superseded
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
ACOUSTICS - STANDARD REFERENCE ZERO FOR THE CALIBRATION OF PURE TONE AIR CONDUCTION AUDIOMETERS
Superseded date
11-01-1995
Published date
01-12-2013
Deals with 2 earphones; Beyer DT 48 with flat cushion, and Telephonics TDH 39 with MX 41/AR cushion.
Sorry this product is not available in your region.
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.