The NU-6 Low Pass Filter at 1000 Hz© is an auditory processing disorder test that is recommended for children. It is considered a monaural low-redundancy speech test (monaural separation closure-MSC) sensitive to brainstem and cortical lesions.
The NU-6 Low Pass Filter at 1000 Hz© includes a) audio recording, and b) instructions and word list. The NU-6 at 1000 Hz includes age-specific normative data for ages seven through 12.
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Available from Auditec, Inc. Use the “Buy Now” button below or call 1-800-669-9065 (from US) or 314-416-1050 (outside the US) to order. All prices in USD plus S&H. Free shipping is available to locations within the contiguous US. INTERNATIONAL CUSTOMERS: Importers are responsible for duties and taxes. Auditec advises your organization to contact your government to estimate tax prior to ordering.
NU-6 Low Pass Filter at 1000 Hz© (CD Format); Item 169-1; Price $65.00 USD+ S&H 
NU-6 Low Pass Filter at 1000 Hz© (USB Format); Item USB169-1; Price $71.00 USD+ S&H
⇒Auditec sells a similar test called the NU-6 Low Pass Filter at 750 Hz for adults.
Auditec, Inc. 