Hearsay is a statement that (i) is made other than at the trial or proceeding at which it is offered and (ii) is offered to prove the truth of the matter asserted by the maker of the statement, the declarant.

Fed. R. Evid. 608(b) ("Specific instances of the conduct of a witness, for the purpose of attacking or supporting the witness' character for truthfulness, other than conviction of....In the absence of a conviction against a witness, it is generally impermissible to impeach the witness with extrinisic evidence of an act of the witness if the sole purpose of offering the other is to attack the truthfulness of the witness. Evidence is of an act is "extrinsic" if evidence of the impeaching act can be had only by having another witness give evidence of the impeaching act.

United States v. Brito, 427 F.3d 53, 61-63 (1st Cir. 2005) (upholding trial court's admission of the redacted tape of the second 911 call of an anonymous caller as excited utterance because (1) "the immediacy of the....A statement falls within the hearsay exception created by Federal Rule of Evidence 803(2) or a comparable State rule for excited utterances, only if the declarant (the maker of the statement) was under the stress of the startling event or condition when he or she made the statement that relates to that startling event or condition.

United States v. Polk, 56 F.3d 613, 631-632 (5th Cir. 1995) (upholding trial court's admission into evidence of the tape recordings because they were sufficiently authenticated considering that the agent testified that....A matter may be authenticated by the testimony of a witness who has personal knowledge that the matter is what its proponent claims it is.